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Biomedical subjects

K Ruttle

Publications and source records attributed to K Ruttle.

3 recordsLinked to original sources

The family-oriented home visiting program: a longitudinal study.

Designed and tested a home-based intervention program for low-income mothers with toddler and at least one other child under five. Sex of toddlers and race (black or white) about equally divided. Nine months of weekly home visits were specifically planned for each mother to enhance her effectiveness as an educational change agent. Treatment was planned to promote skills and understandings applicable over range of ages. Pretests, immediate posttests, and posttests one and two years later were administered to 27 experimental families and to a randomly assigned control group of 20. At .05 level of significance or beyond, experimentals excelled controls on receptive language test (toddler), on the Caldwell HOME (mother was indirectly rated as an educational change agent), and on a measure of teaching style (mother). They were also significantly superior on the Binet (toddler) at second posttest. No differences found with older siblings on Slosson Intelligence Test. Differences at third posttest were at least as great as earlier ones on mother measures. Relationships among child and mother measures are discussed.

Child Behavior Disorders

The responses of one-day old Acomys cabirinus pups to naturally occurring chemical stimuli.

The role of olfactory stimuli in the mediation of the behavior of 26--36 hour old spiny mice (Acomys cabirinus) was assessed through a series of six experiments. The major results of these experiments are: 1. One day old spiny mice showed a preference for soiled bedding from their own home-cage as compared to clean bedding in a simultaneous two-choice preference test. 2. No significant preference was displayed for home-cage bedding vs. bedding from the cage of a conspecific litter and parents. 3. Soiled bedding from the home-cage was preferred over soiled bedding from the cage of a nulliparous adult female conspecific. 4. A reduced mean latency to leave an area of clean bedding was found in comparison to mean latencies to leave soiled bedding from the subjects' home-cage or from the cage of a conspecific litter. 5. No differential activity levels were displayed on home-cage vs. clean bedding. It was concluded that by the second day of life, Acomys pups have developed attachment to chemical stimuli produced by specific classes of conspecifics--and that the early appearance of such attachments is a function of the high degree of sensory and motor precocity of the Acomys pups at birth. The adaptive value of such rapidly developed attachments in precocial as contrasted to altricial species was discussed.

Age Factors