Anticipation and habituation bias method-of-limits threshold estimates
Evidence
Stimuli were 500 ms long with 100 ms ramps, nonharmonic tone complexes with 202 equal amplitude pure-tone frequency components, spaced every 1/33.3 octave from 100 to 6400 Hz. The amplitudes of the pure tones were modulated by a sine wave with a 33 % modulation depth. A three-interval, two-alternative forced choice task was used, with a reference stimulus of 20 ripples per octave (RPO) presented at 65 dBA. The target stimulus initially had 0.5 RPO and the number of ripples was modified using a 1-up/1-down adaptive procedure with a step size of 0.2 RPO. — Dijk, Pim van, Physiology, Psychoacoustics and…, 2095 (
#expands, via linked claim)
Categorization
- XREF: connects to: Undefined observation intervals prevent artificially low thresholds; Staircase procedures overestimate thresholds relative to theoretical targets; Spectral ripple thresholds are measured with a forced-choice flat-versus-modulated comparison — Dijk, Pim van, Physiology, Psychoacoustics and…, 2095
Related
- Spectral modulation threshold is the smallest detectable spectral contrast in a ripple stimulus (similarity 0.84)
- Spectral ripple thresholds are measured with a forced-choice flat-versus-modulated comparison (similarity 0.83)
- The method of limits estimates thresholds by averaging ascending and descending detection levels (similarity 0.80)
- Adaptive threshold methods trade fast converging results against convergence risk (similarity 0.80)
- Adaptive staircase procedures converge to thresholds by adjusting signal level per answer (similarity 0.80)
- Adaptive 3-down 1-up tracking with 2 dB steps estimates spectral ripple thresholds (similarity 0.80)
- The method of adjustment is flexible but yields listener-dependent thresholds (similarity 0.79)
- Undefined observation intervals prevent patients from anticipating signals and biasing thresholds low (similarity 0.79)
- Threshold estimates reflect both ear sensitivity and listener response bias (similarity 0.78)
- Thresholds can be measured by tracing stimulus change until perception flips (similarity 0.78)
- Adaptive staircase procedures trade efficiency and bias avoidance against convergence risk (similarity 0.78)
Broader Connections
- Undefined observation intervals prevent artificially low thresholds
#corroborates(0.80) - Staircase procedures overestimate thresholds relative to theoretical targets
#qualifies(0.75) - Spectral ripple thresholds are measured with a forced-choice flat-versus-modulated comparison
#expands(0.72) — Dijk, Pim van, Physiology, Psychoacoustics and…, 2095