Fig. 4
From: Language play facilitates language learning: Optimizing the input for gender-like category induction
Pitch contours of the auditory stimuli used in training modes Prose (red) and Rhyme (blue). V1 and V2 are the two vowels in the object noun (Lelop, Molun, Gitun, V1: [e:, o:, i:], V2: [ɔ, u, u:]), and V3 and V4 are the vowels in the marker (ano, gla, ino, ono, sla; when the marker included only one long vowel ([a:] in gla, sla) instead of two shorter vowels ([a, i, o] in ino, ano, ono), the long vowel was mapped onto V3 and V4). [i], [a] and [ɪ] are the three vowels included in Tika and the verbs (pif or pim)