The present study investigates the roles of the linguistic system and the visual system in conceptual processing by delving into the levels of individual differences, words and tasks. For this purpose, we reanalysed three previous studies with large samples that had implemented the paradigms of semantic priming (Hutchison et al., 2013), semantic decision (Pexman et al., 2017) and lexical decision (Balota et al., 2007). to test the effects of interest rigorously, the analysis was performed using mixed-effects models that included covariates. At the word level, corpus-based measures had large effects in the three studies, whereas visual strength only had an effect in the semantic decision task. Furthermore, in the semantic priming study, the cosine similarity between prime and target words was more influential in lower-vocabulary participants and with the long interstimulus interval. Last, a power analysis suggested that 400 participants are more than enough to examine corpus-based measures, 800 participants are necessary to examine visual strength, and more than 800 are necessary to examine vocabulary size.