Shallow psychometric slopes reflect listener response uncertainty
Evidence
In each MCPF, the vertical distance between the upper and lower boundary curves for a category is the probability of that category. The steeper the slope of a curve, the more defined the distinction between categories, whereas shallower curves coincide with probability being more distributed across categories, over a range of levels. A wider probability distribution across categories indicates that the listener had more uncertainty (i.e. entropy) in their responses. — Dijk, Pim van, Physiology, Psychoacoustics and…, 2549
Categorization
Category: Definitional Content
- DEFINE: Defines how MCPF curve steepness encodes uncertainty/entropy in categorical loudness ratings.
Related
- Boundary-curve slope in a categorical loudness function encodes perceptual category certainty (similarity 0.92)
- Categorical loudness data is probabilistic, not reducible to a median response curve. (similarity 0.85)
- Loudness response variability is informative signal, not noise to discard (similarity 0.85)
- Loudness judgments at a fixed level vary probabilistically across categories (similarity 0.84)
- Loudness perception is probabilistic, with a response distribution at each stimulus level. (similarity 0.84)
- Mid-range loudness categories show the most listener uncertainty (similarity 0.82)
- Listeners with identical hearing thresholds differ in suprathreshold loudness perception (similarity 0.81)
- Listener response uncertainty concentrates in the 5-25 CU loudness range. (similarity 0.81)
- An 11-category loudness scale decomposes into 10 parameterized boundary curves. (similarity 0.80)
- Modeling the multi-category psychometric function markedly improves loudness estimation accuracy. (similarity 0.80)
- Equal-loudness contours vary greatly across individual listeners (similarity 0.80)
- People with identical audiometric thresholds can perceive loudness differently. (similarity 0.79)
- A multi-category psychometric function maps response category probabilities onto stimulus level (similarity 0.79)
- Loudness category boundaries are least certain in the mid 5-25 CU range (similarity 0.78)
- Loudness category uncertainty peaks in the very soft to medium range (similarity 0.78)