The present study tested the effect of a familiar context on 3- and 5 1/2-y
ear-olds' ability to produce a target duration (5 s), in 30 discrete trials
, with two types of responses: (a) response durations and (b) temporal inte
rvals. In the familiar context, the subject's production of duration was ac
counted for by the doll's behavior (getting dressed). In the unfamiliar con
text, the production of duration was decontextualized, as in arbitrary labo
ratory situations. Children produced longer and less variable durations in
the familiar than in the unfamiliar context. However, only the 5 1/2-year-o
lds succeeded in producing accurate durations in the familiar context. The
children's timing accuracy was not better with either type of response. Con
trary to our predictions, durations were shorter and more variable with dur
ation responses than with interval responses. The results are discussed in
the framework of a dissociation between 3-year-olds' knowledge about durati
on and 5 1/2-year-olds concept of time.