Introduction to Psychometric Functions

Psychometric functions were fitted to the empirical data.

JNDs based on the best-fitting psychometric functions were measured for size visual judgments (Exp.

We fit psychometric functions to the pooled data and to the data from each virtual environment and each participant individually.

Unmasked speech elicited faster responses and sharper psychometric functions, which steadily declined in noise.

The results for the two degraded listening conditions yielded similarly shaped, monotonically increasing psychometric functions.

The test applies adaptive procedures to measure psychometric functions and provides thresholds with associated confidence intervals.

Purpose The purpose of this study was to examine (a) the psychometric functions of Mandarin speech-on-speech masking with a comparison to the psychometric properties of the English version and (b) the feasibility of using the method of adaptive tracking (MAT) to measure Mandarin speech recognition thresholds in different masker conditions using a Chinese coordinate response measure (C-CRM) speech corpus.

Our results exemplify that the shape of visual psychometric functions depends robustly on the diurnal state of the animal, its search strategy, and even its diurnal history of performing the task.

Psychometric functions were estimated in a vowel categorization task along the /i/ to /ε/ (as in “bit” and “bet”) continuum following a context sentence, the long-term average spectrum of which was manipulated at the level of either fine-grained local spectral cues or coarser global spectral cues.

Results: The point of subjective equivalence (PSE) is extracted from psychometric functions obtained during pre-testing and post-testing.

To address these caveats, we quantified the effect of facial color and background color on anger with psychometric functions measured with the method-of-constant-stimuli while facial hue or surround hue was varied in CIELAB color space.

Psychometric functions were fit to the data and shifts in the point of subjective verticality (PSV) were measured.

In experiments on behavioral adaptation, hundreds or even thousands of trials per subject are often required in order to accurately recover the many psychometric functions that characterize adaptation’s time course.

Two-parameter (threshold, slope) psychometric functions were fit to the data in each condition.

Results The 2 degraded speech understanding conditions yielded similarly shaped, monotonically increasing psychometric functions with the closed-set tasks having shallower slopes and higher scores than the open-set task for the same listening condition.

A one-interval, adaptive tracking paradigm using the SIAM procedure (Kaernbach, 1991) was used to determine three points on the psychometric functions so that detection thresholds and slopes could be compared.

Psychometric functions fitted to the data indicated a steep slope of 16%/dB, and test–retest reliability of sound reception threshold estimates was 1.

Psychometric functions were collected characterizing the discrimination of target vowels from reference vowels.

From the resulting psychometric functions the SRC was measured as the difference between test and comparison regularity at the PSE (point of subjective equality).

Psychometric functions of vowel detection and identification for 12 American English isolated vowels in long-term speech-shaped noise were examined for young listeners with normal hearing in this study.

Psychometric functions (PFs) relating d’ performance to the difference in nominal values were obtained for the cues presented individually and in combination.

Indeed, neurometric functions for PSS were in good agreement with the behaviorally derived psychometric functions.

Stage 1 measured psychometric functions for the detection of AM alone and FM alone imposed on a 1-kHz carrier, using 2- and 10-Hz rates.