The influence of motor processes on attitudes toward novel versus familiar semantic stimuli

Recent research has suggested that the motor processes elicited by upper arm isometric flexion and extension can subtly influence attitudes. Specifically, ideographs evaluatively categorized while performing isometric upper arm flexion were subsequently preferred to ideographs evaluatively categorized while performing isometric upper arm extension. The present research sought to replicate this attitudinal effect with semantic stimuli and to examine a theoretical boundary condition posited by the elaboration likelihood model (ELM). Subjects categorized either neutral words or pronounceable nonwords while adopting the isometric positions. Results indicated that motor processes influenced subsequent attitudes toward stimuli with few associations (i.e., nonwords) more than toward stimuli with many associations in memory (i.e., familiar words). These results are consistent with a growing literature on the possible influence of nondeclarative (e.g., procedural) knowledge on attitudes.