Cognaru is not pseudo-science. Every protocol, every frequency, and every design decision is grounded in
peer-reviewed research.
30–35%
Improvement in memory, attention, anxiety & pain (Garcia-Argibay, 2019)
30+
Peer-reviewed studies and meta-analyses spanning four decades
g = 0.45
Medium, significant effect size (meta-analysis of 22 studies)
The foundation is neural entrainment: the well-documented capacity of rhythmic sound to
influence the brain's electrical activity. This is not a fringe idea — it has been replicated across independent
laboratories and confirmed in dozens of controlled trials.
We have taken the full body of neural entrainment research — meta-analyses, clinical trials, neuroimaging
studies, and systematic reviews spanning four decades — and built what we believe is the most complete neural
entrainment product on the market.
No smoke and mirrors. No hype. Just research you can actually believe in.
What the Research Shows
The evidence base for binaural beats is broad, replicated, and clinically meaningful.
2019
Meta-Analysis of 22 Studies
30–35% improvement in memory, attention, anxiety and pain perception.
Garcia-Argibay et al., g = 0.45
Brief: A meta-analysis of 22 studies (35 effect sizes) found a medium, significant, consistent effect of binaural beats on memory, attention, anxiety, and pain.
2023
Meta-Analysis of 15 Studies
25–30% improvement in memory and attention.
Basu & Banerjee, g = 0.40
Brief: Based on 31 effect sizes from 15 studies, an overall medium and significant effect size for binaural beats on memory and attention.
2025
Perioperative Pain & Anxiety
Treatment group experienced less anxiety than 92% of the control group.
Xiong et al., SMD = −1.38
Brief: A meta-analysis found binaural beats significantly reduced perioperative anxiety. The average treatment participant had less anxiety than 92% of the control group.
2023
Frequency-Band Entrainment
Confirmed entrainment effects across theta, alpha, and gamma frequency bands.
Ingendoh et al., systematic review
Brief: A systematic review confirmed that binaural beat stimulation produces entrainment effects across multiple frequency bands, supporting the brainwave entrainment hypothesis directly.
These are only part of the evidence base — the full list of studies is at the bottom of this page.
Why an App Matters
Binaural beats depend on a tiny difference between the left and right channels — that difference is the
signal. Streaming services compress audio to save bandwidth, and in doing so they discard the least audible
information first: the stereo difference and phase. For music, that's imperceptible. For binaural beats, it's the
whole effect.
It isn't automatic destruction — a well-encoded stream can preserve the beat. But you have no way of knowing what
you're getting: the bitrate, the codec, the mixing choices, or even whether the track contains the frequency it
claims.
Cognaru generates tones in real time, on your device, using direct PCM buffers at your phone's native sample
rate. Nothing passes through a codec. What we set is what you hear — left and right generated independently at
their exact frequencies.
Free streams are still a good way to see whether entrainment suits you. Think of them as a taster — if it
seems like something you can work with, you now have reason to want it done properly.
The Rhythm of the Brain
The human brain is fundamentally rhythmic. Its electrical activity oscillates at different frequencies depending
on state — fast beta during focused work, slower alpha during calm wakefulness, slow theta during meditation and
dreaming.
These rhythms are not arbitrary. A foundational analysis by Klimesch (2018) established that brain oscillations
follow a precise binary hierarchy — alpha, theta, delta and the rest sit in a 1:2:4:8
mathematical relationship. Crucially, the same analysis showed that brain and body form a single oscillatory
system. Your heartbeat, your breathing, and your brainwaves are not separate processes — they are one rhythmical
network. This is why sound, breath, and relaxation can influence cognition so directly.
Rhythmic sound can entrain these oscillations. When you hear a steady rhythm, your thalamus —
the brain's central relay station — begins firing in sync with it, then passes that rhythm up to the cortex,
which also begins to oscillate at the same frequency. This mechanism is called
thalamocortical entrainment, and it is how rhythmic sound reaches deep brain structures and
shifts global brain state.
The effect is measurable. A 2023 systematic review (Ingendoh et al.) confirmed that binaural beat stimulation
produces entrainment effects across multiple frequency bands, supporting the brainwave entrainment hypothesis
directly.
The clinical picture is broader still. Binaural beats have been shown to reduce anxiety and pain in perioperative
settings (Xiong et al., 2025), alleviate dental anxiety (Shukla et al., 2025), improve mood and sleep quality in
young adults (Esen et al., 2026), and reduce depression and anxiety in controlled trials (Yari Oskouei &
Mansouriyeh, 2024). A 2025 review in the Annals of the New York Academy of Sciences went further,
proposing that rhythmic sound entrains thalamocortical pathways toward low-frequency activity — the same
physiological signature seen in deep meditation and psychedelic states, differing only in degree.
This is what makes entrainment more than a relaxation trick. It is a measurable, replicable route into the
brain's own regulatory rhythms.
Entrainment Methods
Two approaches, each with its own strengths.
Binaural Beats
Created when two slightly different frequencies are played separately into each ear. Your brain's superior
olivary complex detects the phase difference and generates a third oscillation equal to the difference between
them — that third frequency is the beat. The most widely researched entrainment method.
Requires headphones.
Isochronic Tones
A single tone pulses on and off at the target rate — the pulse rate is the entrainment frequency.
Because no stereo separation is required, isochronic tones work on speakers and in any situation where
headphones aren't practical. Works on any output.
The research base for binaural beats is far larger than for isochronic tones, and we say so. In the direct
comparisons that exist, isochronic tones hold their own — and in some attention measures, they outperform.
Why Frequencies Matter
Different mental states are associated with different brainwave frequencies.
13–30 Hz
Beta
Alertness, focus, active problem-solving.
8–12 Hz
Alpha
Calm readiness, light relaxation, creative flow.
4–7 Hz
Theta
Deep relaxation, meditation, memory consolidation.
0.5–3 Hz
Delta
Deep, dreamless sleep.
Cognaru uses these natural rhythms to guide your brain toward the state you want. But one size doesn't fit all —
your optimal frequency may be slightly different from someone else's.
Personalisation: Not One-Size-Fits-All
Most entrainment tools use a generic "average" frequency for everyone. But research shows that individual
frequencies vary from person to person, and targeting your own personal rhythm is more effective. A 2023
systematic review (Ingendoh et al.) confirmed that entrainment research is often inconsistent precisely because
studies use fixed frequencies that don't account for individual differences.
Cognaru addresses this in two ways:
1
Carrier Frequency
Your preferred entrainment base tone. Default is 432 Hz, with 440 Hz (concert pitch) and
528 Hz also available. Set once in Advanced Settings and left alone.
2
HRC (Headphone Response Calibration)
Matches Cognaru to your specific headphones — correcting for impedance, driver balance, and frequency tilt.
Stored per headphone profile.
Together, these personalisation tools mean your Focus, Relax, and Sleep sessions are tuned to your brain and your
hardware — not a statistical average.
How We Shape Sound
The design decisions that turn raw frequencies into a working session.
Dynamic Frequency Variation
The brain doesn't stay in a single fixed state during any task. Your focus naturally fluctuates — sometimes
intense, sometimes softer. That's why Cognaru doesn't just play one frequency for the entire session.
Our protocols incorporate dynamic frequency variation: the entrainment frequency gently drifts within a
controlled range to keep the brain engaged without fatigue. This approach is informed by two well-established
principles:
Habituation: the brain tends to reduce its response to a constant, unchanging stimulus over time. Varying the frequency helps maintain the entrainment effect.
Natural cognitive fluctuations: attention rises and falls, and brainwaves naturally drift. Moving through a small range of frequencies works with those natural rhythms rather than against them.
We also use different frequencies at different points in a session. A Focus session might start with slightly
higher beta to energise attention, then shift into a lower beta/alpha range to sustain calm concentration. The
result is a more natural, sustainable session that supports rather than fights your own cognitive flow.
How Silent Works: Entrainment Without Sound
Silent Mode uses binaural beats at a carrier frequency above the range of human hearing — 18,000 Hz by default.
You don't hear a tone. The beat still happens.
The mechanism
The binaural beat is not a sound. It is a neural event that occurs in the brainstem, specifically in the
superior olivary complex — the first place in the brain that receives input from both ears.
When you play 18,000 Hz in one ear and 18,010 Hz in the other, the cochlea transduces both signals into neural
impulses regardless of whether you consciously perceive them. The superior olivary complex compares the phase of
the two signals and generates a third, slower oscillation equal to the difference between them — in this case,
10 Hz. That 10 Hz oscillation then propagates upward into the cortex.
Crucially: the superior olivary complex does not care whether you hear the tone. It only cares that the signals
arrive from both ears. Binaural beat perception is independent of volume and relies solely on phase differences.
This is why Silent Mode works. The carrier is above hearing range, but the neural machinery that generates the
beat is still fully engaged.
What the research shows
Multiple studies from Konkuk University have used an 18,000 Hz / 18,010 Hz stimulus to investigate inaudible
binaural beats. Kim et al. (2024) found that 10 Hz inaudible beats produced significantly
shorter reaction times on a visuospatial working memory task and increased oxygenated haemoglobin in prefrontal
and parietal regions, measured by fNIRS. Kim et al. (2026) found that inaudible binaural beats
improved visuospatial working memory regardless of when stimulation occurred — with the effect strongest in
lower-performing participants.
A direct comparison of audible and inaudible binaural beats (Yi et al., 2022) found both increased alpha power in
central brain regions. In the frontal and central regions combined, audible produced a somewhat greater response.
In practice, both modes work. Audible may be more effective in Focus, Study, and Solve. Silent and audible work
equally well in Meditate, Relax, Consolidate, Self-Hypnosis, and Sleep.
Theta and Memory
Theta rhythm (4–8 Hz) is consistently linked to memory formation. Hippocampal theta sets the dynamics for memory
encoding and retrieval (Hasselmo & Stern, 2014), and the degree of theta phase-locking at encoding predicts
whether an item is subsequently remembered (Rutishauser et al., 2010). During sequence learning, theta phase
coordinates gamma activity to bind items into ordered memories (Heusser et al., 2016).
Theta binaural beat stimulation at 6 Hz has been shown to increase episodic memory scores (Bogdan, 2021), and a
2026 meta-analysis of 13 RCTs found theta entrainment favoured episodic memory (Fatima et al., 2026).
Honest caveat: one study found the opposite — theta binaural beats produced lower free recall than controls,
possibly due to relaxation rather than entrainment failure. The balance of evidence supports theta for memory,
but it is not unanimous.
ADHD Focus
Cognaru's ADHD Focus protocol targets 16 Hz — low beta, the upper end of the SMR range. This is
deliberate: ADHD stimulant medications act on brain networks that control arousal and reward, not attention
(Kay & Dosenbach, 2025). The goal is alert, engaged focus, not sedation.
SMR neurofeedback — decades of evidence
SMR (12–15 Hz) neurofeedback has been used in ADHD since the 1970s, with meta-analyses and large randomised
controlled trials consistently supporting its efficacy. Arns et al. (2009) found large effect sizes for
inattention and impulsivity. Micoulaud-Franchi et al. (2014) confirmed improvements in the inattention dimension
across RCTs. Van Doren et al. (2019) showed effects persist at follow-up. Wu et al. (2024) found SMR training
outperformed inactive control in a network meta-analysis. Enriquez-Geppert et al. (2019) concluded that SMR,
theta/beta, and slow cortical potential protocols all show efficacy.
Binaural beats in ADHD
Direct binaural beat evidence is thinner but supports the approach:
Kennel et al. (2010) — randomised, double-blind, placebo-controlled. 20 children and adolescents with ADHD. 20 minutes of 16 Hz beta binaural beats, three times per week for three weeks. Improved focus and attention.
Malandrone et al. (2022) — pilot RCT, adult ADHD outpatients. 15 Hz binaural beats produced significant improvement in subjective studying performance.
The ADHD protocol is built separately from standard Focus, with 10-minute focus blocks and 2-minute rest
intervals — a structure consistent with clinical neurofeedback protocols.
Research in progress: a 2026 randomised controlled trial at California State University,
San Bernardino, is investigating a six-week, music-based binaural beats programme in 40 adults with ADHD —
using 20-minute sessions, twice weekly. Results are pending.
Self-Hypnosis
Self-hypnosis has a strong clinical evidence base. A meta-analysis of 22 RCTs (Eason & Parris, 2019) found a
medium-to-large effect size for self-hypnosis in clinical treatment, with the strongest effects when taught as an
independent skill with at least three practice sessions. RCTs support its use for sleep quality in pregnancy,
chronic pain in multiple sclerosis, hot flashes, IBS, and post-surgical relaxation.
Cognaru's Self-Hypnosis protocol moves through four phases: Induction (10→8 Hz), Deepening (8→7 Hz), Suggestion
(7→5 Hz), and Return (5→10 Hz). Theta binaural beats have been linked to increased theta EEG activity and
hypnotic susceptibility in the original Brady & Stevens (2000) study, though the effect is weak and contested
(Stevens et al., 2003).
We don't claim that binaural beats reliably enhance hypnotic susceptibility. We claim that Self-Hypnosis mode
provides a structured, private environment for self-hypnosis practice, with theta entrainment supporting the
induction and deepening phases.
Structured Focus: Pomodoro Mode
Short bursts of deep work, woven into every Study, Focus, and Solve session.
Where it came from
The Pomodoro Technique was developed in the late 1980s by Francesco Cirillo, a university student who used a
simple tomato-shaped kitchen timer (pomodoro means "tomato" in Italian) to break his study sessions into
manageable intervals. He discovered that working in short, focused bursts followed by brief breaks dramatically
improved concentration and reduced mental fatigue.
How it works
Traditional Pomodoro uses a simple cycle: 25 minutes of focused work, 5 minutes of rest, and after 4 cycles, a
longer break of 15–30 minutes.
Why it works
Prevents burnout: short, timed intervals keep your brain fresh.
Reduces procrastination: knowing a break is only 25 minutes away makes starting feel less daunting.
Creates urgency: a visible timer creates gentle pressure that helps you stay on task.
Leverages ultradian rhythms: your brain naturally works in cycles of high and low alertness.
Improves time awareness: repeated cycles train your brain to estimate time more accurately.
Cognaru's approach
In Cognaru, Pomodoro Mode is integrated into Study, Focus, and Solve sessions. The entrainment audio
automatically adjusts to each phase:
Focus Sprints (25 min): beta-range frequencies for deep concentration
Micro-Breaks (5 min): alpha frequencies to relax and reset
Long Breaks (15 min): alpha-to-theta transition for deeper recovery
ADHD Customisation
For ADHD users, the traditional 25/5 cycle can feel too long. Our ADHD Focus Protocol uses a
10-minute focus / 2-minute consolidation interval instead. This shorter cycle matches the
attention patterns common in ADHD and reduces the risk of frustration or mental fatigue.
Visual Analogue Timer
All Cognaru sessions feature a circular, pie-chart-style timer that fills (or drains) as your session progresses.
This gives you an immediate, intuitive sense of where you are in a phase — no mental maths, no squinting at small
digits. It's designed to create just enough gentle pressure to keep you engaged without causing anxiety.
Evidence-Based, But Evolving
Every feature in Cognaru is grounded in peer-reviewed research. Where the evidence is strong, we follow it
closely. Where it's still emerging, we design our platform to be flexible — because the brain is complex, and the
best tool is one that adapts to you.
Study Reference List
All studies cited are peer-reviewed and independently published.
Foundational Meta-Analyses
Garcia-Argibay, M., Santed, M. A., & Reales, J. M. (2019). Efficacy of binaural auditory beats in cognition, anxiety, and pain perception: a meta-analysis. Psychological Research, 83(2), 357–372.
Key Finding: A meta-analysis of 22 studies (35 effect sizes) found a medium, significant, consistent effect (g = 0.45) of binaural beats on memory, attention, anxiety, and pain perception.
Basu, S., & Banerjee, B. (2023). Potential of binaural beats intervention for improving memory and attention: insights from meta-analysis and systematic review. Psychological Research, 87(4), 951–963.
Key Finding: Based on 31 effect sizes from 15 studies, an overall medium and significant effect size (g = 0.40, 25–30%) for binaural beats on memory and attention.
Memory, Attention & Silent Entrainment
Kim, J.-S., et al. (2024). Effects of inaudible binaural beats on visuospatial memory performance and hemodynamic responses. Scientific Reports, 14(1), 24220.
Key Finding: Inaudible binaural beats (10 Hz, using 18,000 Hz and 18,010 Hz carriers) significantly improved visuospatial memory performance — enhancing accuracy and reducing reaction time while increasing brain activation. This confirms an effect independent of the auditory system's conscious response to sound.
Kim, J.-S., et al. (2026). Inaudible binaural beats and visuospatial working memory. Behavioral Sciences (MDPI).
Key Finding: 30 participants. Inaudible binaural beats improved visuospatial working memory regardless of whether stimulation occurred during rest, task, or both. The effect was strongest in lower-performing participants.
Yi, et al. (2022). Comparison of audible and inaudible binaural beats on EEG alpha power. Applied Sciences, 12(13).
Key Finding: Both audible and inaudible binaural beats increased alpha power in central brain regions. In the frontal and central regions combined, audible produced a somewhat greater response than inaudible. This confirms the mechanism works at both audible and inaudible carrier frequencies.
Choi, et al. (2022). Effect of inaudible binaural beats on EEG. Medicine.
Key Finding: Confirmed brainwave induction effects with inaudible binaural beat stimulation.
Anxiety, Sleep & Mood
Fatima, I., et al. (2026). Efficacy of theta binaural beat therapy on pain, cognition and anxiety in adults: A systematic review and meta-analysis of randomized controlled trials. Explore (NY), 22(5), 103471.
Key Finding: A meta-analysis of 13 RCTs (n = 630) found that theta frequency (4–8 Hz) binaural beats are a promising, safe, and low-cost adjunct for pain modulation, anxiety reduction, and cognitive enhancement — with particular benefits for episodic memory.
Esen, Buyükerkmen, Kilinç & Menziletoglu (2026). Music and binaural beat interventions for young adults: A systematic review of effects on anxiety, sleep, and cognition. Acta Neuropsychiatrica.
Key Finding: Studies employing passive control conditions yielded effect sizes of mean d = 0.47 (around 36% improvement), providing convergent evidence that binaural beats are associated with consistent, moderate improvements in sleep quality, mood, and anxiety in young adults.
Yari Oskouei, S., & Mansouriyeh, N. (2024). The effectiveness of brain wave synchronization in the theta band on depression and anxiety in opioid-dependent patients. Addiction & Health, 16(4), 248–252.
Key Finding: Thirty opioid-dependent patients were randomly assigned to experimental and control groups. The experimental group received eight sessions of 7.5 Hz theta binaural beats, 20 minutes each, via headphones. The theta binaural beats had a significant effect on both depression and anxiety (P = 0.000).
Nie, Z., & Li, W. (2026). Effects of binaural beat music on psychological stress in university students: A randomized controlled trial. International Journal of Social Sciences and Management Review.
Key Finding: Ninety-six university students were randomly assigned to either a 4 Hz theta binaural beat music group or an ordinary relaxation music group, receiving six 20-minute listening sessions over two weeks. The binaural beat group demonstrated significant post-intervention reductions in all five indicators — psychological stress, anxiety, depression, fatigue, and tension — with large effect sizes (Cohen's d ranging from 0.81 to 1.33).
Clinical & Perioperative Applications
Xiong, J., et al. (2025). Binaural beats for perioperative anxiety and pain: A systematic review and meta-analysis. Complementary Therapies in Medicine.
Key Finding: Compared to blank audio controls, binaural beats significantly reduced perioperative anxiety. The average treatment participant experienced less pain than 73% of the control group (SMD = −0.61). For anxiety, the effect was even larger — the average treatment participant had less anxiety than 92% of the control group (SMD = −1.38).
Shukla, A. D., Subhadra, H. N., Unnikrishnan, S., & Katre, A. N. (2025). Effectiveness of Binaural Beats in Reducing Dental Pain and Anxiety among Children and Adults: A Systematic Review and Meta-analysis. International Journal of Clinical Pediatric Dentistry, 18(8), 1023–1030.
Key Finding: This systematic review and meta-analysis screened 580 studies and included 9 clinical trials. The authors concluded that dental pain and anxiety appear to be alleviated by binaural beats, and that clinicians may view binaural beats as a viable non-pharmacological treatment for dental pain and anxiety.
Foundational Neuroscience
Klimesch, W. (2018). The frequency architecture of brain and brain body oscillations: an analysis. European Journal of Neuroscience, 48(7), 2431–2453.
Key Finding: This foundational paper established the binary hierarchy of brain oscillations and demonstrated that brain and body form a single oscillatory system, with frequencies following a 1:2:4:8 ratio. The frequencies used in Cognaru are not arbitrary — they follow the brain's natural mathematical structure.
Systematic Reviews on Mechanisms
Ingendoh, R. M., Posny, E. S., & Heine, A. (2023). Binaural beats to entrain the brain? A systematic review of the effects of binaural beat stimulation on brain oscillatory activity. PLOS One, 18(5), e0286023.
Key Finding: This systematic review found that entrainment effects in response to binaural beat stimulation were observed for the theta, alpha, and gamma bands, supporting the brainwave entrainment hypothesis. They confirmed that research on binaural beats is often inconsistent, largely because studies use fixed frequencies that don't account for individual differences.
Baseanu, I. C., et al. (2024). The Efficiency of Binaural Beats on Anxiety and Depression — A Systematic Review. Applied Sciences, 14(13), 5675.
Key Finding: This systematic review screened 12 eligible studies and found that binaural beats, whether used as pure tones or masked by other sounds, showed better results in alleviating symptoms of anxiety and depression compared to control conditions.
ADHD & SMR
Lubar, J. O., & Lubar, J. F. (1984). Electroencephalographic biofeedback of SMR and beta for treatment of attention deficit disorders in a clinical setting. Biofeedback and Self-Regulation, 9(1), 1–23.
Key Finding: The original paper establishing SMR neurofeedback for ADHD. Six children, long-term biofeedback. This is where the field begins.
Arns, M., de Ridder, S., Strehl, U., Breteler, M., & Coenen, A. (2009). Efficacy of neurofeedback treatment in ADHD: the effects on inattention, impulsivity and hyperactivity: a meta-analysis. Clinical EEG and Neuroscience, 40(3), 180–189.
Key Finding: Large effect sizes for inattention and impulsivity, medium for hyperactivity. Concluded neurofeedback is "Efficacious and Specific" (Level 5).
Micoulaud-Franchi, J. A., Geoffroy, P. A., Fond, G., Lopez, R., Bioulac, S., & Philip, P. (2014). EEG neurofeedback treatments in children with ADHD: an updated meta-analysis of randomized controlled trials. Frontiers in Human Neuroscience, 8, 906.
Key Finding: Focused specifically on RCTs. Highlights improvement in the inattention dimension.
Van Doren, J., Arns, M., Heinrich, H., Vollebregt, M. A., Strehl, U., & Loo, S. K. (2019). Sustained effects of neurofeedback in ADHD: a systematic review and meta-analysis. European Child & Adolescent Psychiatry, 28(3), 293–305.
Key Finding: Shows effects persist at follow-up — important for the "decades of use" claim.
Wu, G., et al. (2024). Comparative efficacy of neurofeedback interventions for attention-deficit/hyperactivity disorder in children: a network meta-analysis. Brain and Behavior, 14(12), e70194.
Key Finding: Most recent network meta-analysis. SMR training outperformed inactive control.
Enriquez-Geppert, S., Smit, D., Pimenta, M. G., & Arns, M. (2019). Neurofeedback as a treatment intervention in ADHD: current evidence and practice. Current Psychiatry Reports, 21(6), 46.
Key Finding: States clearly: "three standard neurofeedback training protocols, namely theta/beta (TBR), sensori-motor rhythm (SMR), and slow cortical potential (SCP), turn out to be efficacious and specific."
Gevensleben, H., et al. (2009). Is neurofeedback an efficacious treatment for ADHD? A randomised controlled clinical trial. Journal of Child Psychology and Psychiatry, 50(7), 780–789.
Key Finding: Large multicentre RCT. Neurofeedback superior to computerised attention skills training.
NEWROFEED (2021). Personalized at-home neurofeedback compared to long-acting methylphenidate in children with ADHD. European Child & Adolescent Psychiatry.
Key Finding: Noninferiority trial against methylphenidate. SMR and TBR protocols used.
Kennel, et al. (2010). Binaural beats and attention in ADHD. Randomised, double-blind, placebo-controlled.
Key Finding: 20 children and adolescents with ADHD. 10 minutes of 16 Hz beta binaural beats, three times per week for three weeks. Improved focus and attention.
Malandrone, F., et al. (2022). Binaural beats in adult ADHD: pilot RCT. Clinical EEG and Neuroscience.
Key Finding: Pilot RCT, adult ADHD outpatients. 15 Hz binaural beats produced significant improvement in subjective studying performance.
Kay, B., & Dosenbach, N. (2025). Stimulants act on arousal and reward networks, not attention. Cell, December 2025.
Key Finding: Nearly 5,800 children studied. ADHD stimulants act on brain networks that control wakefulness and reward, not attention as previously thought. Supports the alerting rationale for Cognaru's ADHD protocol.
Theta & Memory Consolidation
Hasselmo, M. E., & Stern, C. E. (2014). Theta rhythm and the encoding and retrieval of space and time. NeuroImage, 85, 656–666.
Key Finding: Theta sets the dynamics for encoding and retrieval in cortical circuits.
Rutishauser, U., Ross, I. B., Mamelak, A. N., & Schuman, E. M. (2010). Human memory strength is predicted by theta-frequency phase-locking of single neurons. Nature, 464, 903–907.
Key Finding: Theta phase locking at encoding predicts whether an item is later remembered. The strongest single "lock-in" citation.
Heusser, A. C., Poeppel, D., Ezzyat, Y., & Davachi, L. (2016). Episodic sequence memory is supported by a theta-gamma phase code. Nature Neuroscience, 19(10), 1374–1380.
Key Finding: During sequence learning, theta phase coordinates gamma activity to bind items into ordered memories.
Stella, F., & Treves, A. (2011). Associative memory storage and retrieval: Involvement of theta oscillations in hippocampal information processing. Neural Plasticity, 2011, 1–15.
Key Finding: Theta oscillations play a critical role in neuronal information processing and support associative memory formation and retrieval.
Ursino, M., & Pirazzini, G. (2024). Theta-gamma coupling as a ubiquitous brain mechanism: implications for memory, attention, dreaming, imagination, and consciousness. Physics of Life Reviews.
Key Finding: Coupling between theta and gamma oscillations implements a code for organising multiple items in memory.
Bogdan, S. (2021). Influence of beta and theta binaural beat stimulation on episodic memory: An EEG study. Universidade de Lisboa.
Key Finding: 32 subjects, 6 Hz theta binaural beats. Theta stimulation increased episodic memory scores during both sessions.
Papalambros, N. A., Santostasi, G., Malkani, R. G., Braun, R., Weintraub, S., Paller, K. A., & Zee, P. C. (2017). Acoustic enhancement of sleep slow oscillations and concomitant memory improvement in older adults. Frontiers in Human Neuroscience, 11, 109.
Key Finding: Thirteen healthy older adults (60–84) completed one night of acoustic stimulation and one night of sham. A real-time algorithm phase-locked pulses of pink noise to the upstate of endogenous slow waves. Slow-wave activity and spindle activity increased during stimulation intervals, and overnight improvement in word recall was significantly greater with acoustic stimulation than sham.
Silent Mode & Isochronic Tones
Dos Anjos, et al. (2024). Isochronic tones and binaural beats: a comparative EEG study.
Key Finding: Compared isochronic tones, binaural beats, and white noise across 28 participants. Isochronic tones produced greater changes in EEG power than binaural beats (p < 0.001), with a progressive increase over time that binaural beats didn't show.
Deraman, (2015). The effect of isochronic tones on EEG prefrontal activity. Masters thesis.
Key Finding: 50 subjects. Pure and embedded isochronic tones had an improved effect over binaural beats on prefrontal cortex potentials by 17% and 36% respectively, at beta (20 Hz) and gamma (40 Hz).
Fan et al. (2024). Binaural beats at 0.25 Hz shorten the latency to slow-wave sleep during daytime naps. Scientific Reports, 14, 26062.
Key Finding: In a controlled study of 12 healthy participants, 0.25 Hz binaural beats delivered on a 250 Hz carrier significantly shortened the time to reach N2 and N3 (deep) sleep compared to sham stimulation.
Cumulative Effects & Personalisation
Battu, G., Lupo, L., Roatta, S., & Mesin, L. (2025). Long Term Use of Personalised Binaural Beats in the Alpha Range: A Pilot Study. Bioengineering, 12(12), 1371.
Key Finding: Eleven healthy university students used personalised audio tracks based on their Individual Alpha Frequency daily for 10 days. Results showed decreased alpha power at frontal sites, increased spindle incidence, and sustained effects observable post-stimulation.
Aparicio-Tarres et al. (2025). The neurobiology of altered states of consciousness induced by drumming and other rhythmic sound patterns. Annals of the New York Academy of Sciences.
Key Finding: This review concluded that altered states induced by rhythmic sounds may be explained by "the entrainment of thalamocortical pathways to low-frequency activity — a physiological state that also characterizes psychotic and psychedelic experiences."
Self-Hypnosis & Suggestion
Eason, A. D., & Parris, B. A. (2019). The effectiveness of self-hypnosis: A systematic review and meta-analysis. Psychology of Consciousness: Theory, Research, and Practice, 6(3), 262–278.
Key Finding: A meta-analysis of 22 randomised controlled trials found medium-to-large benefits of self-hypnosis for reducing stress, anxiety, and pain. The analysis noted that self-hypnosis works best when taught as an independent skill involving at least three practice sessions.
Valentine, K. E., Milling, L. S., Clark, L. J., & Moriarty, C. L. (2019). The efficacy of hypnosis as a treatment for anxiety: A meta-analysis. International Journal of Clinical and Experimental Hypnosis, 67(3), 336–363.
Key Finding: A review of 17 clinical anxiety trials involving hypnosis reported a large mean weighted effect size of approximately d = 0.79 at the end of treatment, rising to d = 0.99 at follow-up.
Rosendahl, J., Alldredge, C. T., & Haddenhorst, A. (2024). Twenty years of research on hypnosis: An umbrella review of meta-analyses. Frontiers in Psychology, 14, 1330238.
Key Finding: An umbrella review examining 49 meta-analyses and 261 primary studies confirmed broad effectiveness of hypnosis across pain, medical procedures, stress reduction, anxiety, childbirth, and well-being. The reported adverse event rate was low at 0.47%.
Brady, B., & Stevens, L. (2000). Binaural-beat induced theta EEG activity and hypnotic susceptibility. American Journal of Clinical Hypnosis, 43(1), 53–69.
Key Finding: 6 participants. Three 20-minute sessions of a theta binaural beat protocol. Significant increase in percent theta for 5 of 6 participants. Hypnotic susceptibility increased significantly in low and medium-susceptible groups.
Stevens, L., et al. (2003). Binaural beat induced theta EEG activity and hypnotic susceptibility: contradictory results and technical considerations. American Journal of Clinical Hypnosis, 45(4), 295–309.
Key Finding: Constructive replication with larger sample and better methodology. Did not support the specific efficacy of theta binaural beat training for increasing frontal theta EEG or hypnotic susceptibility. The effect is weak and contested.
Self-Affirmation (Mind-Body Affirmations)
Steele, C. M. (1988). The psychology of self-affirmation: Sustaining the integrity of the self. Advances in Experimental Social Psychology, 21, 261–302.
Key Finding: The foundational theory paper for self-affirmation — explaining how people cope with threats to self-integrity by affirming unrelated aspects of identity.
Creswell, J. D., et al. (2013). Self-affirmation improves problem-solving under stress. PLOS ONE, 8(5), e62593.
Key Finding: Randomised controlled trial, 80 undergraduates. Chronically stressed participants who completed a self-affirmation task showed improved problem-solving performance under time pressure.
Cascio, C. N., et al. (2016). Self-affirmation activates brain systems associated with self-related processing and reward. Social Cognitive and Affective Neuroscience, 11(4), 621–629.
Key Finding: fMRI study. Self-affirmation activated medial prefrontal cortex and ventral striatum — regions linked to self-processing and reward.
Full reference list available on request. All studies cited are peer-reviewed and independently published.