Expressive suppression (ES), or concealing emotional expression, has demonstrated deleterious impacts on both executive functioning (EF) and instrumental activities of daily living (IADLs). Prior findings show that (a) the EF of individuals with high intra-individual variability (IIV) is more vulnerable to ES than that of peers with low IIV and (b) IADLs, which are dependent on EF, are also impacted by ES. However, whether IIV could identify individuals at-risk of ES-induced lapses in IADLs is unknown. To test this question, 51 community-dwelling older adults (aged 60-95, mean education=16.88 years) completed a baseline measure of IIV (the Push-Turn-Taptap task) followed by three weeks of daily ES measurements and real-world IADL tasks. In a hierarchical linear regression, the interaction between daily ES and IIV significantly predicted IADLs [∆F=4.916, p=.032] beyond recent ES and IIV. The SPSS PROCESS macro was then used to decompose the interaction. Participants who demonstrated high baseline IIV were more affected by ES than peers who reported low IIV. These results demonstrate that the negative association between daily ES and IADLs is stronger for individuals with higher IIV and suggest that IIV may be a predictor of vulnerability to ES-induced lapses in both cognitive and daily functioning.
|First Author||Libby Anne DesRuisseaux|
|Second Author||Stacey Lynne Brothers|
|Third Author||Yana Suchy|