Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Mean preference scores for novel stimuli in the habituation experiment. Error bars indicate ±SEM. Results for the pretest phase are indicated by light gray bars, and results for the posttest phase are indicated by dark gray bars. A significant difference was found only in the between-category pair. Asterisks indicate a statistically significant difference: **P < 0.01.
