Influence of colors in distractor videos on the recording of cortical auditory evoked potentials.
Jamyle Rodrigues Luis, Pedro de Lemos Menezes, Carlos Henrique Alves Batista and 1 others
Color video as a distractor during CAEP recording changed the waveform — longer P1 and P2 latencies in both ears, lower P1 amplitude in the right ear — compared with black-and-white video.
The authors recommend using black-and-white video for CAEP testing with speech stimuli.
Key findings
1Color video produced longer P1 and P2 latencies in both ears compared with black-and-white video (right ear: P1 p=0.002, P2 p=0.000; left ear: P1 p=0.000, P2 p=0.031).
2P1 amplitude was lower with color video in the right ear (p=0.013), while P2 amplitude was higher with color video in both ears (right p=0.016, left p=0.048).
3Latency variability was lower with the black-and-white video, particularly for P1 and N1 in both ears and P2 in the right ear; amplitude variability did not differ significantly between conditions.
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How it was doneWhat they found
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What it does not show
No one's eyesight was formally tested, so it is unknown whether some participants perceived the color video more vividly than others. The two videos were not matched for brightness or contrast, so the effect attributed to 'color' may partly reflect differences in how bright or sharp the images looked. No one measured how attentive the participants actually were during each recording, so differences in attention could explain some of the waveform changes. The 30 participants were recruited by convenience at a single university lab, not randomly selected from a broader population. The researchers who scored the waves did not formally track how often they disagreed before reaching consensus.
Declared interests
No financial support or conflicts of interest were declared.
The easy way to misread this
Do not read the latency and amplitude differences as proof that color itself is the cause — the two videos were not matched for brightness or contrast, and no one measured how attentive participants were during each recording. The effect could be partly due to differences in image brightness or in how engaged each person was, not to the presence of color per se.
Summarised by AI from the full paper, without a clinician reviewing it. Check it against the source before it changes what you do. Read it on PubMed →