Two approaches were used to investigate the problems or issues that parents of infants encounter: the study of circumstances that are naturally recognized by the parent as an issue, and the study of simulated problems concerning commonly occurring infant care issues. A paradigm of problem solving behavior was used to formulate the component of a descriptive study for the purpose of examining the problem solving behavior of mothers during their infants' first 3 months. Mothers who participated in both studies were married or living with a partner, were 17 years or older, and had healthy infants. The objective of the first study was to capture in the mothers' own terms their specification and description of the issues on which they were working and the nature of the infant care task, including the types of help mothers used and the stressors and supports they experienced. Logs were used by 62 mothers (38 primiparae and 24 multiparae) for 90 days after their infants' births to record these issues, types of help, stressors, and supports. Predetermined categories were used to code the data. The type of help used varied significantly by category of issue. Books were used most frequently for issues of growth and development and baby care, and they were used more often than all types of clinicians combined for these types of issues. For over one-third of issues, no help of any type was used. Multiparae and primiparae did not differ significantly in the total number of issues reported, nor in the frequency with which help was used. The objective of the second study was to examine the types of goals and decision making rules that mothers applied to two simulated infant care problems: one concerning the amount of the feeding, and the second concerning noncontingent crying. Four simulated problem exercises were presented to 22 mothers (14 primiparae and 8 multiparae), using a telephone interview in the infants' first 3 months. The results of the study revealed that mothers gave a variety of names to the same problem. The types of goals that mothers identified varied by type of problem. More mothers cited competence as a goal for the crying than the feeding problem. More mothers were able to state the decision rule they had used for naming the problem than for choice of action to solve the problem (implementing).(ABSTRACT TRUNCATED AT 400 WORDS)