Electrode pairs are judged discriminable only when performance exceeds chance

Evidence

Another possibility is that confusion between within-pattern intervals and between-pattern transpositions may make individual patterns less distinctive, and so increase the task difficulty. Therefore, we also investigated the effects of transposition size and interactions between transposition size and within-phase intervals. Finally, the predictive coding account of perception (Friston 2005 ) suggests that the precision with which perceptual discriminations can be made is inversely related to stimulus variance, suggesting that task difficulty would increase with variance of standard phrase pitch intervals. — Dijk, Pim van, Physiology, Psychoacoustics and…, 5269 (#expands, via linked claim)

Categorization

• XREF: connects to: Deactivating discriminable electrodes controls whether benefit comes from channel count or pitch quality; Auditory detection and discrimination are distinct abilities that can diverge; Perceptual discrimination precision falls as stimulus variance rises — Dijk, Pim van, Physiology, Psychoacoustics and…, 5269 (+3 more)

Related

• Electrode pairs are judged discriminable by binomial significance on pitch ranking (similarity 0.87)
• Perceptual discrimination precision falls as stimulus variance rises (similarity 0.86)
• Deactivating discriminable electrodes controls whether benefit comes from channel count or pitch quality (similarity 0.84)
• Auditory detection and discrimination are distinct abilities that can diverge (similarity 0.82)
• Perceptual pitch ranking and direct electrical stimulation yield concordant electrode discrimination (similarity 0.81)
• Trained panels can bypass consensus vocabulary because perception varies less than description (similarity 0.81)
• Speech discrimination requires intact frequency resolution (similarity 0.81)
• Electrode deactivation outcomes depend on stimulation rate and filter allocation differences (similarity 0.80)
• Pitch-ranking can identify which cochlear implant electrodes are safe to deactivate (similarity 0.80)
• Exact repetition allows direct pitch comparison whereas transposition forces interval processing (similarity 0.80)
• No single standard metric describes auditory intensity discrimination (similarity 0.79)
• Pitch discrimination passes are set by binomial significance thresholds on a fixed trial count. (similarity 0.79)
• Deactivating non-distinct cochlear implant electrodes fails to improve speech perception (similarity 0.79)
• Difficult change-detection tasks exclude some normal-hearing listeners entirely (similarity 0.79)
• Deactivating cochlear electrodes with indistinct pitch responses improves speech perception for most users (similarity 0.79)

Broader Connections

• Auditory detection and discrimination are distinct abilities that can diverge #expands (0.80)
• Physiological tests measure neural representation, not actual hearing #expands (0.78)
• Perceptual discrimination precision falls as stimulus variance rises #expands (0.75) — Dijk, Pim van, Physiology, Psychoacoustics and…, 5269
• Experimental method determines what discrepancies listeners can perceive #qualifies (0.75)
• Perceptual pitch ranking and direct electrical stimulation yield concordant electrode discrimination #expands (0.72)