Identification task or more like a discrimination task

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Reference no: EM133262406

Case: Human newborns suck in response to interesting stimuli. Researchers measured infants' sucking rate on a pacifier nipple in response to spoken syllables. After establishing the babies' baseline sucking rate (B), they presented a set of repeated stimuli, either /ba/ or /pa/, and measured the sucking rate. Once the sucking rate had decreased, the researchers played a new set of stimuli whose VOT was 20 milliseconds different from those in the first set, and continued to measure the sucking rate.

In the figure depicted here, the dotted vertical line represents the moment at which the stimuli switched. The graph on the left shows the case where the 20 ms difference between the two sets of stimuli spanned the category boundary between /ba/ and /pa/. The graph on the right shows the case where the 20 ms difference was a within-category difference (either one /ba/ vs. a different /ba/ or one /pa/ vs. another /pa/).

Question 1: Is the task the babies performed more like an identification task or more like a discrimination task? Explain your reasoning.

Question 2: In class, we examined the results of identification and discrimination experiments with adult participants (Wood, 1976). Are the results of this infant study consistent with those adult results, or do they contradict those results? Explain your reasoning.

Reference no: EM133262406

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