Abstract
Behavioral thresholds of 6-month-old infants and adults were determined for 1/3-octave filtered clicks and 300-msec noise bursts with center frequencies ranging from .5 to 8 kHz. For noise bursts, differences between infant and adult thresholds were largest at low frequencies and smallest at 8 kHz. For clicks, infants’ thresholds were most like adults’ at 4 kHz, and age differences increased at both lower and higher frequencies. Differences between click and noise thresholds were significantly larger for infants than for adults at .5, 1, and 8 kHz, but not at 2 and 4 kHz. These results suggest that improvements in threshold for long-duration stimuli during infancy may not be accompanied by comparable changes in threshold at short durations. The delayed development of sensitivity to low- and high-frequency clicks appears consistent with maturational trends recently described for the auditory brainstem response.
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This work was supported, in part, by a grant from the March of Dimes Foundation and by NIH Grant ROl-DC00017.
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Berg, K.M. A comparison of thresholds for 1/3-octave filtered clicks and noise bursts in infants and adults. Perception & Psychophysics 54, 365–369 (1993). https://doi.org/10.3758/BF03205272
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DOI: https://doi.org/10.3758/BF03205272