Daily Affect and Daily Prospective Memory in People after Stroke and Their Partners: The Moderating Role of Resting Heart Rate.

INTRODUCTION: Experimental research suggests that affect may influence prospective memory performance, but real-life evidence on affect-prospective memory associations is limited. Moreover, most studies have examined the valence dimension of affect in understanding the influence of affect on cognitive performance in daily life, with insufficient consideration of the arousal dimension. To maximize ecological validity, the current study examined the relationships between daily affect and daily prospective memory using repeated daily assessments and the role of resting heart rate on these relationships. We examined both valence and arousal of daily affect by categorizing affect into four dimensions: high-arousal positive affect, low-arousal positive affect, high-arousal negative affect, and low-arousal negative affect. METHOD: We examined existing data collected from community-dwelling couples, of which at least one partner had a stroke history. The analytic sample included 111 adults (Mage = 67.46 years, SD = 9.64; 50% women) who provided 1,274 days of data. Among the participants, 58 were living with the effects of a stroke and 53 were partners. Participants completed daily event-based prospective memory tasks (in morning and/or evening questionnaires), reported daily affect in the evening, and wore a wrist-based Fitbit device to monitor resting heart rate over 14 consecutive days. RESULTS: Results from multilevel models show that, within persons, elevated high-arousal negative affect was associated with worse daily prospective memory performance. In addition, lower resting heart rate attenuated the inverse association between high-arousal negative affect and lowered prospective memory performance. We did not find significant associations of high- or low-arousal positive affect and low-arousal negative affect with daily prospective memory. DISCUSSION: Our findings are in line with the resource allocation model and the cue-utilization hypothesis in that high-arousal negative affect is detrimental to daily prospective memory performance. Lower resting heart rate may buffer individuals' prospective memory performance from the influence of high-arousal negative affect. These findings are consistent with the neurovisceral integration model on heart-brain connections, highlighting the possibility that cardiovascular fitness may help maintain prospective memory into older adulthood.

Having time to oneself in times of extended togetherness: Solitude experiences during the COVID-19 pandemic.

This study investigated how time to oneself (solitude) is experienced under conditions of extended togetherness with household members during the pandemic. Both structural (living arrangements) and qualitative characteristics (relationship quality and conflict) were examined for their association with solitude desire and daily solitude-affect links. We expected that people living with others and those with more high-quality as well as those with more conflictual relationships would report better affect quality when experiencing solitude. A Canadian adult lifespan sample (N = 141; Mage = 38.43 years, SDage = 17.51; 81% female; 73% White; data collected from April to August 2020) provided information on household size and relationship characteristics and completed repeated daily life assessments of solitude desire, solitude, and affect. Findings show that living arrangements were not associated with an increased desire for solitude or better affect quality from solitude. Individuals reporting higher relationship quality and individuals reporting more conflict showed more favorable affect quality on days when they had time in solitude than individuals reporting lower quality relationships and lower conflict. Findings add to the growing solitude literature by delineating who seeks and benefits from solitude, and under what conditions.

Time-varying associations between loneliness and physical activity: Evidence from repeated daily life assessments in an adult lifespan sample.

Physical activity is a behavior that promotes physical and mental health; yet physical activity has decreased during the COVID-19 pandemic. To promote health during times of challenge, it is important to identify potential barriers to this key health behavior, such as loneliness. This brief report extends previous research on physical activity and loneliness that mainly focused on between-person differences to examine their time-varying associations at the within-person level using repeated daily life assessments. From April 2020 to August 2020, data were collected from a sample of 139 community-dwelling Canadian adults (M age = 40.65 years, SD = 18.37; range = 18-83 years). Each evening for 10 consecutive days, participants reported their loneliness, number of steps, and minutes of moderate-to-vigorous physical activity. Results revealed that, in line with our hypotheses, on days when participants reported more loneliness they also engaged in less moderate-to-vigorous physical activity than on less lonely days (estimate = -0.24, p = 0.007); there was a significant negative association between loneliness and daily number of steps (estimate = -18.42, p = 0.041). In contrast, at the between-person level, overall loneliness was not associated with overall physical activity engagement after accounting for within-person differences and control variables (age, sex, day in study). From an intervention perspective, our findings suggest that it is promising to tackle loneliness on a day-to-day basis to increase physical activity one day at a time. This may be especially relevant during times mandating social-distancing, but also at other times when individuals experience greater feelings of loneliness.