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BCIA Continuing Education Posts
The BioSource Faculty Explain Peer-Reviewed Science


Interpreting the Raw EEG: Rhythmic Mid-Temporal Theta of Drowsiness (RMTTD)
In recordings of drowsy subjects, RMTTD often coexists with slowing of the posterior dominant rhythm and the emergence of vertex sharp waves, further supporting its link to transitional drowsiness states rather than to epilepsy or cortical dysfunction.
Fred Shaffer
Jun 19, 20258 min read


Interpreting the Raw EEG: Slow Alpha
Not all slow alpha is a pathological sign. A subset of these slow rhythms, especially when reactive and morphologically stable, represents not a degradation of function but a subharmonic of the canonical posterior dominant rhythm (PDR), generated by the same resonant thalamocortical loop but oscillating at half the fundamental frequency.
BioSource Faculty
Jun 19, 202514 min read


Interpreting the Raw EEG: Fast Alpha
The most pressing clinical issue surrounding fast alpha is its frequent misclassification, particularly when spectral peaks in the 18–19 Hz range are erroneously interpreted as beta spindling, pathological fast activity, or early signs of drug effects.
Fred Shaffer
Jun 18, 202512 min read


Interpreting the Raw EEG: Temporal Intermittent Rhythmic Delta Activity (TIRDA)
The most common diagnostic pitfall occurs when TIRDA is misread as nonspecific temporal slowing. Many readers unfamiliar with its focal rhythmic structure mistakenly attribute it to background slowing due to prior injury or generalized dysfunction.
BioSource Faculty
Jun 18, 202513 min read


Interpreting the Raw EEG: Occipital Intermittent Rhythmic Delta Activity (OIRDA)
We wish clinicians knew that OIRDA is not an epileptiform discharge. It does not reflect hyperexcitability or paroxysmal depolarization, and in isolation, it is not a seizure pattern.
Fred Shaffer
Jun 17, 202516 min read


5-Min Science: Your Brain Emits Biophotons
The idea that the brain might not just glow but use this glow as part of its signaling has remained speculative—until now.
Fred Shaffer
Jun 16, 20257 min read


The Clinician Detective: Investigation Begins with Careful Observation
Before a diagnosis of a mental disorder can be made, the clinician must rule out that the symptoms are not attributable to the physiological effects of a substance or another medical condition.
Fred Shaffer
Jun 16, 202514 min read


How Benzodiazepines Affect the EEG
Benzodiazepines vary widely in EEG and clinical effects—Subtypes differ by half-life and receptor affinity, influencing sedation, rebound symptoms, and cortical modulation.
Fred Shaffer
Jun 16, 202514 min read


How Antidepressants Affect the EEG
Antidepressants, particularly those that are highly activating or serotonergically potent, may be the worst choice in patients with SEB, IEDs, or focal abnormalities.
Fred Shaffer
Jun 15, 202532 min read


Dr. John Davis on the Alpha Rebound Protocol for PTSD
Reduced alpha rhythms in PTSD are thought to be involved in poor excitatory/inhibitory balance in the brain.

John Davis
Jun 13, 202514 min read


BCIA's New Performance Certification Designation
The Biofeedback Certification International Alliance (BCIA) is introducing a new performance-focused certification designation.
Fred Shaffer
Jun 11, 20253 min read


5-Min Science: How We Distinguish Reality from Imagination
Dijkstra and colleagues identified a specific neural mechanism that our brains use to distinguish the vivid world of our imagination from the tangible reality we perceive through our senses.
Fred Shaffer
Jun 11, 20254 min read


5-Min Science: HRV Biofeedback Can Reduce Anger in Teenagers with ASD
Dr. Heidi Hillman’s (2025) study explored the application of heart rate variability (HRV) biofeedback to reduce anger in autistic adolescents.
BioSource Faculty
Jun 10, 20254 min read


The Clinician Detective: First Inspect the Raw EEG
Used responsibly, the qEEG enhances interpretation; used in isolation, it risks misrepresentation.
Fred Shaffer
Jun 6, 202523 min read


Best Practice: Small-N Research
Small-N designs are particularly powerful when the treatment effect is large and immediate, allowing researchers to infer causality with confidence.
BioSource Faculty
Jun 5, 202524 min read


Best Practice: Why Research Is Critical
The goal of this post is to help you think like a scientist when it comes to evaluating questionable claims.
BioSource Faculty
Jun 4, 202524 min read


Best Practice: Interrogating Causal Claims
To support a causal claim, a study must meet three essential criteria: covariance, temporal precedence, and internal validity.
BioSource Faculty
Jun 4, 202527 min read


Best Practice: Interrogating Association Claims
Interrogating association claims means asking three core questions: Were the variables measured well (construct validity)? Can the results be generalized to other populations (external validity)? And is the association statistically strong, significant, and precise (statistical validity)?
BioSource Faculty
Jun 4, 202513 min read


Best Practice: Interrogating Frequency Claims
The four big validities offer a comprehensive toolkit for evaluating psychological research. Construct validity ensures that variables are accurately measured or manipulated. External validity tells us whether the results generalize. Statistical validity ensures the numbers are trustworthy. Internal validity confirms that cause-and-effect relationships are legitimate.
BioSource Faculty
Jun 4, 202515 min read


Best Practice: Researcher Claims
Association claims are foundational to psychological research because they help us identify variables that are connected and warrant further investigation. While they cannot prove causality, they provide essential groundwork for asking deeper questions.
BioSource Faculty
Jun 4, 202524 min read
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