Sixty-five mother-infant dyads (infants at ages 6 and 8 months) partic
ipated in a longitudinal study of interactional and attentional relati
onships. interaction was coded as attention following (AF), attention
switching (AS), or joint attention. A laboratory-based assessment of i
nfant fixation duration was used. AF and AS were unrelated at 6 months
but inversely related at 8 months. Surprisingly, AF and AS were unrel
ated to joint attention. All variables were stable, and, except for a
few correlations at 6 months, fixation duration was unrelated to inter
action variables. These findings suggest that joint attention does not
typically occur with infants younger than 9 months, but mothers may b
egin a pattern of interaction, AF or AS, with the you ng infant before
joint attention emerges.