Relations between infant irritability and maternal responsiveness at 12 and
18 months were investigated in low-income mother-infant dyads. Emphasis wa
s placed on whether results varied according to measurement strategies, inf
ant gender, or level of maternal social support and satisfaction with that
support. Irritability was measured separately through observation and mater
nal report, responsiveness was measured observationally, and maternal socia
l support and satisfaction were self-reported via questionnaire. Concurrent
relations between irritability and responsiveness were, in general, negati
ve and were larger when irritability was measured observationally rather th
an by maternal report. Correlations were similar across gender. No longitud
inal relations were found between irritability and responsiveness. Amount o
f maternal social support was weakly related to responsiveness and to respo
nses to infant irritability, and the nature of these relations was unexpect
ed. Irritability-responsiveness relations varied as a function of measureme
nt strategies, which may in part explain mixed findings in the empirical li
terature.