Concreteness and valence ratings are frequently controlled for in psycholinguistic experiments. Associated valence and concreteness effects appear to be well-established phenomena within psycholinguistic research. However, recent studies indicated replication difficulties (e.g., Kousta et al., 2009; Yap & Seow, 2014; Brysbaert et al., 2016; Kousta et al., 2011). Considering that some approaches to valence and concreteness effects such as the Dual Coding Theory or the Affective Priming Approach would suggest that additional embodied information could be responsible for the processing advantage associated with concrete and positive lexical items, individual differences could partially explain why these effects could be found in some studies but not others: For instance, the temperament trait of Sensory Processing Sensitivity has been associated with a deeper and more detailed processing of sensory and affective information and could therefore influence how likely the effects could be found in a particular study considering the respective participant sample. Specifically, certain explanations at the lexico-semantic level such as the Dual Coding Theory, the LASS account, and the Affective Priming Approach would suggest stronger valence and concreteness effects in individuals with high Sensory Processing Sensitivity. Other lexico-semantic approaches that explain these effects in a disembodied manner, would predict no differences between sensitivity groups. Finally, the automatic vigilance approach as well as a general tendency to pause and check before engaging in a response would predict reduced concreteness and valence effects for individuals with high SPS. These predictions will be tested in a lexical decision task on four lists of 12 words each that differ in terms of their valence and concreteness (2 x 2) but are matched for number of syllables, number of letters, frequency, and arousal. In addition, distractor items and an equal number of nonwords will be included. After the lexical decision task, participants will complete the SPS measure.