The psychometric properties of the Salthouse Listening Span (SLS; Salthouse & Babcock, 1991) task are relatively unknown.

Previous research has demonstrated that SLS performance is positively associated with processing speed and vocabulary (Salthouse, 2005). Further research has documented that SLS performance is useful in differentiating attention deficit/hyperactive disorder from other clinical conditions (Nikolas, Marshall, & Hoelzle, 2019). While the SLS task is purported to measure working memory, relatively little is known about how the task is related to frequently administered neuropsychological measures. Furthermore, it remains unclear whether emotional functioning may affect task performance. The current study investigates associations between frequently administered tasks and the SLS as well as the impact of anxiety and depression on SLS performance.

A battery of neuropsychological tasks and self-report measures was administered to undergraduates [N=161, 75.2% female, Mage=19 (1.06), MGPA=3.5(.35)]. Participant exclusion based on failed performance validity task, non-native English speaking, and/or task incompletion resulted in a final sample of N=131. Participants completed the SLS, a task where one answers questions about sentences read aloud to them, while simultaneously attempting to remember the final word from sentences. SLS performance was quantified two ways: (1) longest span score (SLS-LSS) and (2) total words recalled correctly (SLS-WRC). Anxiety and depression were measured via the Beck Anxiety Index (BAI) and the Beck Depression Index (BDI). Two groups were derived based on participant BAI and BDI responses: low to mild emotional distress (N=99, scores of 0-15 on BAI, BDI, or both) and moderate to severe emotional distress (N=33, scores of 16-63 on the BDI, BAI, or both). Correlations were conducted between the SLS and WAIS-IV: digit span, arithmetic, coding, and symbol search, DKEFS: verbal fluency, and WTAR. A one-way ANOVA was run to examine potential differences in performance on the SLS based on levels of emotional distress.

The SLS-LSS had negligible correlations with verbal fluency, coding, or symbol search performances (r<0.1). SLS-LSS demonstrated a small to medium positive correlation with arithmetic [r(130)=0.17, p=.06], digit span [r(130)=0.27, p=.002], and WTAR [r(130)=.27, p=.002]. SLS-WRC did not demonstrate meaningful correlations with any cognitive domain. Overall, the presence of moderate anxiety and/or moderate depression did not significantly affect performance on SLS- LSS [F(1, 130)= 1.5, p=0.22] or SLS-WRC [F(1, 132)=0.55, p=0.46].

The SLS is a promising cognitive task with little research investigating its psychometric properties. Overall, minimal correlations were observed with tasks quantifying executive functioning, verbal abilities, and processing speed. Lack of strong correlations indicate that more research should be conducted to fully understand what this task is measuring. Moreover, the SLS-WRC score did not appear to have significant correlations across domains, indicating that the SLS-LSS may be more strongly related to working memory and general intelligence. Encouragingly, emotional functioning did not appear to impact performance on this task. While the SLS appears to have some relation to IQ, more research should be conducted to determine what this task measures and what variables may affect task performance.