Figure 7

Correlation of the strength of dimensional biases and performance. (a) Correlation between the Dimensional Bias Index (DBI) and response time (ms) is shown for humans and monkeys. (b) Correlation between the DBI and the mean percentage of correct responses (accuracy) is shown for humans and monkeys. The dotted line indicates the fitted regression line. Each dot indicates the DBI for each human participant or each testing session (monkeys). The DBI represents the magnitude of bias towards a particular dimension (positive and negative values indicate a bias toward colour and shape, respectively). The further from zero (indicating no dimensional bias), the stronger the bias toward the relevant dimension. Note that the direction of dimensional bias differs between humans and monkeys.