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Child Procedure Lab Report

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Procedure
The parent/guardian first completed a demographic questionnaire, containing questions, such as “Does your child have older/younger siblings” and “Was your child more than 6 weeks premature?”. After obtaining informed consent from the parent/guardian, the infant sat on the parent/guardian’s lap, in the centre of the experimental head-turn booth. The parent/guardian was given noise-cancelling headphones playing an adult directed voice, speaking of semantically-unrelated information to mask the auditory stimuli. The experimenter was sat outside of the experimental head-turn booth, but was able to observe the infant through a video camera (without sound capture). The experiment consisted of two habituation trials and eight experimental
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When the experimenter judged that the infant was looking at the green light, they started the trial, by presenting them with the stimulus. If the infant was not looking at the green light, the parent/guardian pointed at the green light to guide the infant, as instructed to do so prior to the experiment. The green light stopped when the child looked and a red light started flashing either on the left or right side (randomised and counterbalanced) of the infant. When the infant turned to the side where the red light was flashing, a sound file was played via a speaker located right below the flashing light, either until the file was over or until the child looked away. For the habituation trials, the sound file was music, and for the experimental trials, the sound file was “mummy”…show more content…
The summary of the alternative mispronunciations of the word “mummy” used in the other four conditions is presented below. The capitalised letters indicate where the intensity was increased by 5 decibels.

Table 2
List of alternative mispronunciations (MP) of the word “mummy”, with the phoneme of interest, feature change, and number of infants tested per condition.
MP Phoneme Feature Change Number of infants memmy /e/ Vowel change 16
Mummy /m/ Increased intensity on initial consonant 16 nummy /n/ Consonant change
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