The authors investigated the link between children's temperament and the development of asthma and allergies. Prospective longitudinal data on children at the ages of 3-5 months, 3-5 years, and 7-9 years were collected. At age 7-9 years, analyses were performed on data for 3 groups of children (n = 42): those with asthma (no allergies), those with allergies (no asthma), and those with neither asthma nor allergies (the control group). Data for children who developed asthma or allergies prior to age 7-9 years were not analyzed. Differences were found in the premorbid period between the control group and the children who later developed asthma or allergies as well as between the asthma and allergy groups. After onset of illness, no temperamental differences were observed between the 3 groups. The study shows the importance of longitudinal design for asthma research.

Abstract.— Problems in testing visual acuity of preschool children were discussed with regard to choice of optotype and test distance, illumination, instruction and response indicator, and the motivational aspect of the test situation. A test situation conforming to these requirements for measuring visual acuity was arranged for testing of preschool children, using a discrimination learning paradigm with simultaneous presentation of the cues. The test figures were two Landolt Cs of equal size but one with the gap filled in, thus forming a circle. Small toys were used as rewards for choosing the Landolt C. Of 27 children, 2–6 years of age, 25 achieved a visual acuity level corresponding to a Snellen value of 20/20. The results thus indicate a better visual acuity for preschool children than is commonly believed.

No abstract

26 children, one to three years old, were briefly separated from their parents in a strange situation in order to investigate the relation of age to children's crying and manipulation behavior. A significant negative correaltion was found between age and crying (r=÷0.51), while no relation was observed between age and manipulation. The results support Bowlby's (1973) view that the peak of separation distress occurs during the child's second year of life.

The purpose of the study was to answer 2 questions: (1) are children 12 to 24 months old able to interpret their parents' accessibility on the basis of previous separation, and (2) how long do the effects of a brief, experimental separation last? 20 children were observed with their parents for 3 min, were then left alone for 3 min, and were observed for 3 min following reunion; as controls 19 children stayed with their parents for 9 min. The children were later observed after 1 or 2 weeks, this time they were free to separate themselves from their parents in order to explore an adjoining room. Observations were made by scoring predefined behavior measures from videotape. Results showed effects 1, but not 2 weeks after separation, and suggest that separation chiefly affects behaviors which involve confidence in parents' physical accessibility.