Previous research has demonstrated differences in the acoustic features of crying signals between deaf and typical hearing (TH) infants. This study aims at comparing the acoustic parameters of cries of infants with different degrees of deafness versus TH infants. About 110 infants aged 6-12 months (61 TH infants, 34 infants with bilateral deafness…

There is preliminary evidence that infant siblings of children with Autism Spectrum Disorder (ASD) have an atypical pattern of cry, characterized by higher fundamental frequency and increased dysphonation. This prospective study collected multiple cry samples of 12-month old siblings of children with ASD (n = 22, "high-risk" group) and…

Using electrocardiogram data with 78 six-month-old infants, this study examined the presence or absence of brief orienting bradycardia during the onset of maternal arm-restraint and subsequent differences between infants on behavioral organization during restraint. Results showed that 45 of the infants exhibited brief episodes of bradycardia at…

Crying behavior and mother-infant interactions during episodes of crying were coded using the Cry Observation Codes and then compared for 48 mother-infant dyads of children with autism, children with developmental delays, and typically developing children. At 1 year of age, children who would later be diagnosed with autism showed a different…

Episodes of crying with higher fundamental frequency (f0) are perceived as more aversive and distressful than lower frequency cries. Besides, previous studies have speculated that in children with Autism Spectrum Disorder (ASD) higher f0 may account for evoking mental states of uneasiness in the caregiver. Moreover no evidence on developmental…

Assessed 40 women's responses to young infants' cries. Mothers and nonmothers were similar in basic features of caregiving behaviors. Although the sound of infant cries may inform caregivers about distress level, caregiving behaviors appear to be determined by additional factors. (RH)

Examined behavioral/physiological responses of 2-month-olds during physical examinations. Found that colic infants cried twice as much, cried more intensely, and were more inconsolable than control infants. Heart rate, vagal tone, and cortisol measures showed no appreciable difference. At home, colic infants displayed a blunted rhythm in cortisol…

Conducted spectrum analysis of standard and vociferous cries from infants with Wessel's colic, non-Wessel's colic, and comparison infants. Vociferous cries had longer duration, higher fundamental frequency, and greater percentage of dysphonation than standard cries. After feedings, problematic criers had greater percentage of dysphonation in…

Examined differences in acoustic characteristics of cries, both early and late, within a prolonged crying bout. Results indicated that late cries appeared to result from a smaller number of factors than did early cries. Results support notions that crying bouts settle into a regular cry with acoustic features matching a theoretical model of cry…

This annual report presents several articles related to the work of the Clinical Center for Child Development at Hokkaido University in Sapporo, Japan. The articles are: (1) "Maternal Speech and Behavior during Mother-Infant Play: Comparison between the United States and Japan" (Sueko Toda, Marc H. Bornstein, and Hiroshi Azuma); (2)…