An additional important difference between the present and previous studies (Kiss et al., 2008; Doallo et al., 2012) was the inclusion of a control condition. Previous studies only compared the preference for the go stimuli with that for the no-go stimuli. Therefore, it was unclear whether the pictures presented in the go trials acquired positive valence or the pictures presented in the no-go trials acquired negative valence. One possible approach to clarify this is to include novel stimuli that were not presented in the go/no-go task. However, this might be inappropriate given that the distractor devaluation effect can occur in a category-based manner (Goolsby et al., 2009b). That is, it even occurs for novel stimuli belonging to a previously ignored category. Therefore, we did not include novel stimuli for a control condition. Instead, we asked participants to evaluate the preference for the pictures before and after the go/no-go task. This procedure would make it possible to disentangle the effect of response type on emotional devaluation through response inhibition.