Parenting stress in mothers of very-low-birth-weight (VLBW) and full-term infants: a function of infant behavioral characteristics and child-rearing attitudes.

OBJECTIVE: To examine the moderating effects of child-rearing attitudes on the relation between parenting stress and infant behavioral characteristics for mothers of very-low-birth-weight (VLBW) and full-term infants. METHODS: Fifty-six 9-month-old infants (23 VLBW and 33 full-term) and their mothers were the participants. Mothers completed measures of parenting stress, child-rearing attitudes, infant temperament, and infant behavioral problems. RESULTS: The VLBW infants had a higher frequency of behavioral problems, and their mothers reported more child health concerns than the mothers of the full-term infants. Regression analyses showed that the relation between parenting stress and infant distress was moderated at medium and high levels of parental strictness for only the VLBW infants. CONCLUSIONS: The amount of stress the mothers of the VLBW infants experienced was a result of the congruence between their infant's behavioral characteristics and their own child-rearing attitudes.

Sleeping through the night: a developmental perspective.

This study examines falling asleep and night waking in human infants during the first 8 months of life. All-night time-lapse video recordings were obtained at 3 weeks and 3 months of age; a Sleep Habits Interview was completed at these ages and repeated at 8 months of age by telephone interview. At the 3-week and 3-month ages, self-report measures of maternal psychologic distress, depression, and self-esteem were also obtained. The data are examined from both cross-sectional (age group) and longitudinal (individual) perspectives. Parent-infant interactions at bedtime and during the middle of the night changed significantly with increasing age. At 3 weeks of age, most infants were put into their cribs for the night already asleep. When they awakened in the middle of the night, they were removed from their cribs. By the time they returned to their cribs, they were again asleep. By 3 months of age, infants who were put into the crib awake at bedtime and allowed to fall asleep on their own were more likely to return to sleep on their own after awakenings later in the night. In contrast, infants who were put into the crib already asleep at the beginning of the night were significantly more likely to be removed from the crib following a subsequent nighttime awakening. Thus, the pattern of bedtime sleep onset was related to sleep onset following an awakening in the middle of the night. This association was present at 8 months as well.(ABSTRACT TRUNCATED AT 250 WORDS)

Rhythmic motor behavior of preambulatory motor impaired, Down syndrome and nondisabled children: a comparative analysis.

The developmental course of rhythmic motor behavior was followed longitudinally for three groups of preambulatory children--normally developing, Down syndrome, and those with profound motor impairment. The groups differed in chronological age but were comparable with respect to motor age. The motor impaired subjects displayed significantly less rhythmic motor behavior than the nondisabled and Down syndrome groups. In comparing particular subtypes of rhythmic motor behavior, differences were found in both the average number of bouts and duration of subtypes among the groups. Longitudinal analyses of the data over the entire observation period revealed that the rhythmic motor behavior of the children with Down syndrome was more similar to that exhibited by the nondisabled children than was the rhythmic motor behavior of the children with motor impairment. However, there was considerable variability among the groups in several particular subtypes.

The properties of V in newborns across repeated measures.

It has been argued that a recently developed measure, vagal tone (V), is a significant advancement over other existing methods of assessing the periodic variation in heart rate associated with respiration (respiratory sinus arrhythmia). It has been further suggested that, as a noninvasive measure of vagal nerve efferent activity, V may facilitate the early identification of infants at risk for developmental disabilities. This study addressed the relationship between V and other measures of cardiac activity and behavioral state and the stability of V across repeated measures. Twelve samples of cardiac activity were collected from each of 20 full term infants, 6 samples on each of two consecutive days. V values were derived using a spectral analysis program comparable to Porges' patented MXedit process. Measures of behavioral states were collected by continuous observation. Heart period and heart period variability were highly correlated with V. Variation in V between behavioral states was also detected. Repeated assessments revealed that average V values collected in the same state were not significantly correlated across successive days. This short-term variability both between and within individuals does not support the notion that a single assessment of V can, by itself, be used to identify at-risk infants or predict developmental outcome.

The influence of rotary vestibular stimulation upon motor development of nonhandicapped and Down syndrome infants.

The vestibular system plays a major role in the expression of early motor behavior. Previous research has cited extensive neural connections between the vestibular apparatus and the motor system. Accordingly, some therapists have implemented programs of supplemental vestibular stimulation to improve motor and cognitive abilities in children with delayed motor development. In the present study a quantifiable regimen of supplemental rotary vestibular stimulation was administered in a cross-over longitudinal design to nonhandicapped and Down syndrome infants. Time constants, considered a measure of habituation in the vestibular system, were derived from postrotary nystagmus. Results indicated that supplemental rotary vestibular stimulation produced no measurable gain in motor ability beyond that evident in control periods. In addition, it was determined that children exhibited greater gains in motor skills in the early phase of the study, regardless of experimental condition. A positive correlation was found between changes in time constant and motor development.

The immediate and long-term effectiveness of overcorrection in treating self-injurious behavior in a mentally retarded adult.

A brief positive practice overcorrection procedure was used as a method of eliminating head-banging in a profoundly mentally retarded adult. Treatment produced an immediate reduction in head-banging episodes, with near zero occurrence of behavior during the third phase of treatment. One year later data collection was resumed on the subject for an 11-week period. Data from the long-term follow-up revealed that head-banging continued to occur, but mean weekly levels of episodes (M = 5.8) were still well below those recorded during the baseline period (M = 18.8). The overcorrection procedure produced immediate short-term effects and, in this case, was also effective in the long-term. Variables related to the maintenance of response suppression are discussed with respect to this intervention's success.