Zack van Allen

University of Ottawa · School of Psychology

Background Health behaviors play a significant role in chronic disease management. Rather than being independent of one another, health behaviors often co-occur, suggesting that targeting more than one health behavior in an intervention has the potential to be more effective in promoting better health outcomes. Purpose We aimed to conduct a system...

Background: Hepatitis C virus (HCV) infection is a significant global health burden, particularly among people who inject drugs. Rapid point-of-care HCV testing has emerged as a promising approach to improve HCV detection and linkage to care in harm reduction organizations such as needle and syringe programs. The objective of this study was to use...

Background: To counteract the pandemic of physical inactivity, current interventions rely mainly on reflective processes that focus on increasing the motivation to be physically active. Yet, while these interventions successfully increase the intention to be active, their effect on actual behavior is weak. Recent findings in line with the theory of...

Interventions addressing more than one health behavior at a time could be an efficient way of intervening to manage chronic conditions. Within a systematic review of multiple health behavior change (MBHC) interventions, we identified key components of interventions in patients with chronic conditions, assessed how they are linked to theory, behavio...

Background: The aim of this study was to examine the temporal dynamics of health behaviours (e.g., physical activity, alcohol consumption) and pandemic related health behaviours (e.g., hand washing, physical distancing) using network psychometrics. Methods: This hypothesis-generating analysis used temporal network models to fit temporal net-works,...

BACKGROUND AND PURPOSE: In the chronic phase after a stroke, limitations in activities of daily living (ADL) and instrumental ADL (IADL) initially plateau before steadily increasing. However, the benefits of pre-stroke levels of physical activity on these limitations remain unclear. To clarify this relationship, this study compares the effect of ph...

Background: Health behaviors play a significant role in chronic disease management. Rather than being independent of one another, health behaviors often co-occur, suggesting that targeting more than one health behavior in an intervention has the potential to be more effective in promoting better health outcomes. We aimed to conduct a systematic rev...

Background: Access to hepatitis C care within harm reduction community organizations for people who inject drugs is crucial for achieving hepatitis C elimination. However, there is a lack of data on how perceptions of hepatitis C and treatment have changed among individuals visiting these organizations during the era of direct-acting antivirals (D...

Background: Health behaviors such as physical inactivity, unhealthy eating, smoking tobacco, and alcohol use are each leading risk factors for non-communicable chronic disease. Better understanding which behaviors tend to co-occur (i.e., cluster together) and co-vary (i.e., are correlated) may provide novel opportunities to develop more comprehens...

Objectives Vaccinating healthcare workers (HCWs) against COVID-19 has been a public health priority since rollout began in late 2020. Promoting COVID-19 vaccination among HCWs would benefit from identifying modifiable behavioural determinants. We sought to identify and categorize studies looking at COVID-19 vaccination acceptance to identify modifi...

Background Multiple health behaviour change (MHBC) interventions are proposed to be an effective and efficient way of intervening to manage and/or prevent chronic conditions, both with patients (targeting health-related behaviours, e.g. diet, smoking) and healthcare professionals (targeting clinical behaviours, e.g. advice, examine). However, their...

Lab-based experiments and observational data have consistently shown that extraverted behavior is associated with elevated levels of positive affect. This association typically holds regardless of one’s dispositional level of trait extraversion, and individuals who enact extraverted behaviors in laboratory settings do not demonstrate costs associat...

Health risk behaviours such as physical inactivity, unhealthy eating, smoking tobacco, and alcohol use are each leading risk factors for non-communicable chronic disease and each play a central role in limiting health and life satisfaction. However, much less is known about how co-occurring behaviours are associated with health outcomes. Understand...

Background Health behaviors such as physical inactivity, unhealthy eating, smoking tobacco, and alcohol use are leading risk factors for noncommunicable chronic diseases and play a central role in limiting health and life satisfaction. To date, however, health behaviors tend to be considered separately from one another, resulting in guidelines and...

Aim: To identify barriers to/enablers of attendance at eye screening among three groups of immigrantsto Canada from cultural/linguistic minority groups living with diabetes. Methods: Using a patient-oriented research approach leveraging Diabetes Action Canada's patient engagement platform, we interviewed a purposeful sample of people with type 2...

BACKGROUND Health behaviors such as physical inactivity, unhealthy eating, smoking tobacco, and alcohol use are leading risk factors for noncommunicable chronic diseases and play a central role in limiting health and life satisfaction. To date, however, health behaviors tend to be considered separately from one another, resulting in guidelines and...

Health behaviours such as physical inactivity, unhealthy eating, smoking tobacco, and alcohol use are leading risk factors for non-communicable chronic disease and play a central role in limiting health and life satisfaction. To date, however, health behaviours tend to be considered separately from one another, resulting in guidelines and intervent...

Lab-based experiments and observational data have consistently shown that extraverted behavior is associated with elevated levels of positive affect. This association typically holds regardless of one’s dispositional level of trait extraversion, and individuals who enact extraverted behaviors in laboratory settings do not demonstrate costs associat...

Introduction In Canada, deceased organ donation provides over 80% of transplanted organs. At the time of death, families, friends or others assume responsibility as substitute decision-makers (SDMs) to consent to organ donation. Despite their central role in this process, little is known about what barriers, enablers and beliefs influence decision-...

BACKGROUND Immigrants to Canada belonging to ethnocultural minority groups are at increased risk of developing diabetes and complications, including diabetic retinopathy, and they are also less likely to be screened and treated. Improved attendance to retinopathy screening (eye tests) has the potential to reduce permanent complications, including b...

The trait-state isomorphism hypothesis holds that personality traits and states (i.e., trait-related behavior) are characterized by similar outcomes (Fleeson, 2001). Openness is associated with creative thinking, personal growth, and positive affect. Engaging in behavior associated with openness has also been found to covary with feelings of authen...

The goal of the present study was to examine the motivational underpinnings of helping behavior by looking at self-regulatory demands in relation to pro-social personality traits. Across two experiments, we explored the idea that helping behavior is easier or more intrinsically motivated for those high in pro-social traits, and requires more effort...

From the mere presence of plants to window views of nearby nature, contact with nature in the workplace has been associated with increased productivity and creativity, as well as positive emotional and physical health outcomes. Nevertheless, if nature is to be incorporated within or near workplaces effectively, it is important that workers perceive...

According to the facial feedback hypothesis, people’s affective responses can be influenced by their own facial expression (e.g., smiling, pouting), even when their expression did not result from their emotional experiences. For example, Strack, Martin, and Stepper (1988) instructed participants to rate the funniness of cartoons using a pen that th...

The university participant pool is a key resource for behavioral research, and data quality is believed to vary over the course of the academic semester. This crowdsourced project examined time of semester variation in 10 known effects, 10 individual differences, and 3 data quality indicators over the course of the academic semester in 20 participa...

Many Labs 3 is a crowdsourced project that systematically evaluated time-of-semester effects across many participant pools. See the Wiki for a table of contents of files and to download the manuscript.

Positive moods are thought to restore self-control resources following depletion. However, it is not well understood whether this effect is due to affective valence (pleasantness), arousal (activation), or a combination of both. Across four studies, we set out to investigate the role of positive moods on cognitive and behavioral measures of self-re...