The Perception of Baby Temperament Scales (PBT) were used to elicit parental perceptions of infant temperament, with the results rated for internal consistency and congruence between parents. Data was obtained from 26 families, with both father and mother describing their first-born infants at five months of age. The PBT Scales deal with a range of infant responses to situations such as social and autonomous play, feeding preferences and scheduling, bathing and the infant's pattern of sleep and wake cycles. Items selected were restricted to those likely to be familiar to both fathers and mothers. (The PBT's focus on parental perception is seen as contributing to a fuller understanding of the complex interactional dynamics between parent and infant.) Results reported are basically internal analyses of the psychometric properties of the instrument and the congruence of maternal and paternal perceptions. The nine conceptual dimensions of the PBT used were: activity, rhythmicity, adaptability, approach to novel experience, positive mood, threshold, persistence, distractibility and intensity. (BF)