The d' of the between- and within-category pairs for the amusic and control participants in the four stimulus continua in the discrimination task.

<p>The d' of the between- and within-category pairs for the amusic and control participants in the four stimulus continua in the discrimination task.</p

Boundary position and width for the amusic and control participants in the four stimulus continua in the identification task.

<p>Boundary position and width for the amusic and control participants in the four stimulus continua in the identification task.</p

Response curves for the amusic and control participants in the four stimulus continua in the identification task.

<p>Top left panel: Rate of /ji55/ (醫 ‘doctor’) responses in the lexical tone continuum; top right panel: Rate of high level pitch responses in the pure tone continuum; bottom left panel: Rate of /fu55/ (膚 ‘skin’) responses in the vowel continuum; bottom right panel: Rate of /pa55/ (疤 ‘scar’) responses in the VOT continuum.</p

Schematic diagram of the stimulus continua.

<p>(A) Lexical tone and pure tone continuum (/55/ to /25/) with a step size of ΔF0 ≈ 0.90 semitone at the starting frequency which decreased towards the end. (B) Vowel continuum (/u/ to /o/) with a step size of ΔF1 ≈ 42Hz. (C) VOT continuum (/p/ to /p^h/) with a step size of 8 ms.</p

The d' of stimulus pairs for the amusic and control participants in the four stimulus continua in the discrimination task.

<p>The d' of stimulus pairs for the amusic and control participants in the four stimulus continua in the discrimination task.</p

Demographic characteristics of the amusic and control participants.

<p>The results (<i>p</i>-value) of independent-samples <i>t</i>-tests comparing the amusic and control participants in age and the scores of the Online Identification Test of Congenital Amusia test are also reported. n.s. = not significant.</p