Previous literature on the spatial-numerical association of response codes (SNARC) effect examined which factors modulate spatial-numerical associations. Recently, the role of order in the SNARC effect has been debated, and further research is necessary to better understand its contribution. The present study investigated how the order elicited by the context of the stimuli and by task demands interact. Across three experiments, we presented numbers in the context of a mobile phone keypad, an overlearned numerical display in which the ordinal position of numbers differs from the mental number line. The experiments employed three tasks with different levels of consistency with the order elicited by the context. In Experiment 1, participants judged numbers based on their spatial position on the keypad, and we found a spatial association consistent with the keypad configuration, indicating that the spatial association is driven both by the context and by the task when they consistently elicit the same order. In Experiment 2a, participants performed a magnitude classification task, and results revealed a lack of spatial associations, suggesting a conflict between the orders elicited by the context and by the task. In Experiment 2b, participants performed a parity judgment task, and the results revealed a SNARC effect, suggesting that the order elicited by the context did not modulate the spatial association. Overall, three different tasks gave rise to three different results. This shows that the context alone is not sufficient in modulating spatial-numerical associations but that the consistency between the orders elicited by context and task demands is a key factor.
Public Significance StatementHumans use spatial coordinates to mentally represent numbers. Typically, small numbers are represented on the left space and large numbers on the right space. However, the association between numbers and space is quite flexible, and previous studies showed that it could be modulated by the context in which numbers are presented. Is the context sufficient to modulate spatial-numerical associations? In the present study, we demonstrate that task demands have an important role and that the direction of the spatial-numerical association depends on the interaction between task demands and context.