Reaction times, movement times, and static strengths of the four limbs were measured and pubertal status was assessed in males and females at ages nine, 11, 13, 15, and 17 years primarily to separate the effects of sexual maturation from the associated sex and age trends. (RC)

In this study instead of the experimenter controlling the duration of stimulus exposure, the infants' behavior was allowed to control stimulus duration. (Authors/MB)

Linguistic processing by the left and right cerebral hemispheres was investigated in 10 adult stutterers and 10 matched nonstutterers. The stuttering group exhibited a left visual field efficiency or right hemisphere preference for this task and were slower in both vocal and manual reaction times. (Author/CL)

Twenty-four groups of Ss, aged 6 to 21 years and with IQs ranging from 30 to 130, took part in three reaction time (RT) tasks (simple, simple-fixed, and complex). Among findings was that maturation was significantly associated with RT. (SB)

In two experiments, the majority of 21 newborn infants who were maintained in an alert state consistently turned their heads toward a continuous sound source presented 90 degrees from midline. For most infants, this orientation response was rather slow, taking median latencies of 2.5 seconds to begin and 5.5 seconds to end. (JMB)

Fourteen individuals who stutter and 14 nonstuttering individuals were assessed for the magnitude of their eye blink responses to noise bursts as a measure of temperament. Eye blink response to the initial noise burst and the mean of 10 responses were significantly greater for the stuttering group. Additionally, the Nervous subscale of the…

Infants between four and eight months of age were tested for their ability to reach for visible and unseen toys that made sounds. Infants reached for toys in the dark under two auditory illusion conditions, the Haas effect and the midline illusion. Results indicated that, by four months of age, infants perceived the Haas effect and the midline…

Proposes a parallel distributed-processing (PDP) model to account for choice-reaction-time performance in diverse cognitive and perceptual tasks that are interrelated in terms of stimulus-stimulus and stimulus-response overlap. Simulation results support the PDP model. (SLD)

Examined covert attention shifts in infants with event-related potentials (ERPs). Found that reaction time to localize target showed covert attention shifts. There was a larger P1 ERP component on valid trials than on invalid trials or on no-cue control trials. Pre-saccadic ERP potentials in response to target were larger when target was in cued…

We examined the effect of stimulus complexity and frequency on infants' attention responses during an auditory habituation procedure. Five stimuli of different complexity and frequency were presented repeatedly to 80 5-month-old infants. Quicker attention-getting and longer attention-holding responses were obtained with the more complex stimuli.…

Below-average performance on some nonlinguistic tasks often is considered a potential correlate of primary language impairment (LI). If nonlinguistic cognitive processing truly is deficient in children with LI, then measures may be identified that distinguish language learners at risk for LI that are independent of the number and type of languages…