Prosocial Behavior Can Safeguard Mental Health and Foster Emotional Well-being During the COVID-19 Pandemic

NCT ID: NCT04517006

Last Updated: 2021-05-26

Basic Information

• Recruitment Status: COMPLETED
• Clinical Phase: NA
• Total Enrollment: 1328 participants
• Study Classification: INTERVENTIONAL
• Study Start Date: 2021-01-31
• Study Completion Date: 2021-04-04

Brief Summary

The COVID-19 pandemic and the accompanying lockdown measures have made mental health a pressing public health concern. Acts that focus on benefiting others-known as prosocial behaviors-offer one promising intervention that is both flexible and low cost. However, neither the range of emotional states prosocial acts impact nor the size of those effects is currently clear, both of which directly influence its attractiveness as a treatment option. Using a large online sample from Canada and the United States, the investigators will examine the effect of a three-week prosocial intervention on two indicators of emotional well-being (happiness and the belief that one's life is valuable) and mental health (anxiety and depression). Respondents will be randomly assigned to perform prosocial, self-focused, or neutral behaviors each week. Two weeks after the intervention, a final survey will assess whether the intervention has a lasting effect on mental health and emotional well-being. The results will illuminate whether prosocial interventions are a viable approach to addressing mental health needs during the current COVID-19 pandemic, as well for those who face emotional challenges during normal times.

Detailed Description

This study is intended to be published as a registered report. The details of the study design are likely to change somewhat during the review process. However, below is the current plan:

The investigators will examine the effects of prosocial behavior using a 3-week experimental intervention, followed by a follow-up assessment at 5 weeks. At baseline the research team will measure participants' emotional well-being and mental health. Emotional well-being will be assessed using happiness and feeling that one's life is valuable, which is a facet of sense of meaning in life. Mental health will be measured as depression and anxiety. At the end of the baseline survey the researchers will randomly assign participants to one of three experimental conditions (between-subjects design). In each condition, respondents will be asked to perform certain types of behaviors for the first three days of each week, as detailed later in this protocol.

Respondents will be contacted for the first three days each week and asked to report what they did. At the end of weeks 1, 2, and 3 they will complete a longer survey that repeats the same measures of emotional well-being and mental health used at baseline. At this point the intervention will be complete. The investigators will recontact respondent two weeks later (at the end of week 5) to assess whether the intervention has a lasting effect on mental health and emotional well-being. This final survey will also include a measure of whether or not respondents continued their assigned behaviors following the end of the intervention. This measure might be useful for explaining any lasting effects in exploratory analyses.

The expected effect size is d = 0.19. The research team will assess experimental effects using multiple linear regression. The models will include indicator variables for experimental conditions as well as controls for baseline levels of happiness, valued life, depression, and anxiety. These baseline measures should be unrelated to experimental conditions (which will be randomly assigned) so including them will increase the efficiency of estimates. Under the assumption that these variables will account for at least 50% of the variance in the outcomes, the sample size needed to detect an effect of size d = 0.19 with 95% power is N = 357 or approximately 360 per condition. The expected attrition rate is 30% after baseline which means that the investigators will sample 360/0.7 = 514 per condition.

The research team will post the baseline survey in two batches. The first batch will contain half the sample (N = 771), and will be used to gauge the attrition rate (see data exclusion criteria). The sample size of the second batch will be adjusted as needed to try and capture the desired number of respondents per experimental condition. This will lower the size of the second batch if attrition rates are lower than expected or increase the size of the second batch if attrition rates are higher than expected. If a sufficient sample size has not been obtained at this point, the investigators will repeat the process until at least 350 respondents in each experimental condition are recruited. To be clear, the stopping rule for recruiting sample participants does not require estimating any of the effects of interest in the study (i.e., it does not depend on the anticipated effect size). The only factor is whether a sufficient number of respondents have been recruited for each experimental condition.

Obtaining a sufficient per-condition sample size might take several days. The researchers plan to begin sampling on a Sunday and continue sampling (if needed) on Monday. This means respondents will finish their first three days of the study on either Wednesday or Thursday. In either case, the investigators will distribute the end of week 1 survey the following Sunday, which will then put both groups of respondents on the same schedule for the remainder of the study. The researchers will try to recruit the full sample during this initial recruitment phase, as this will simplify administering the study. However, if initial sampling does not yield a sufficient sample size, the researchers will repeat the sampling procedure each week until a sufficient number of respondents is obtained. In this case, the study will be administered to different "cohorts" of respondents spaced a week apart.

Conditions

Happiness; Anxiety; Depression; Morality

Study Design

• Allocation Method: RANDOMIZED
• Intervention Model: FACTORIAL
• Primary Study Purpose: SUPPORTIVE_CARE
• Blinding Strategy: NONE

Study Groups

Track activities

For three weeks research subjects will be keeping track of the things they do without altering their routine in any way.

Group Type: NO_INTERVENTION

No interventions assigned to this group

Self-focused acts

For three weeks research subjects will be "treating themselves" by doing things that they enjoy. These acts don't have to be large or costly, but they should be over and above what they typically do. They are asked to do one (or more) things they enjoy each day for the first three days of each week and report them.

Group Type: EXPERIMENTAL

Self-focused acts

Intervention Type: BEHAVIORAL

Completion of daily acts for personal enjoyment.

Prosocial acts

For three weeks research subjects are asked to perform acts of kindness, meaning behaviors that benefit someone else and are over and above what they typically do (i.e., they are not expected of them). These acts should also involve some sacrifice by them (e.g., in effort, energy, time, or money) and be completed for the first three days of each week.

Group Type: EXPERIMENTAL

Prosocial acts

Intervention Type: BEHAVIORAL

Completion of daily acts for the benefit of others.

Interventions

Self-focused acts

Completion of daily acts for personal enjoyment.

Intervention Type: BEHAVIORAL

Prosocial acts

Completion of daily acts for the benefit of others.

Intervention Type: BEHAVIORAL

Eligibility Criteria

Inclusion Criteria

• Canadian and American respondents from the Amazon Mechanical Turk

Exclusion Criteria

Respondents will be excluded from the study if any of the following apply:

1. A respondent completes the baseline study unrealistically quickly. We measure response speed using the average number seconds spent on each survey item (seconds per item, or SPI). We judge a response to be unrealistically fast if its SPI value is less than 1. SPI calculations will exclude optional items.

2. A respondent does not complete at least half of the items in the baseline survey.

3. A respondent provides off-topic, non-sensical (e.g., random or gibberish words), or non-English responses to an open-ended question in the baseline survey. The open-ended question follows a dictator game (that is not part of the pre-registered portion of the study) and asks respondents what they hoped to accomplish by acting as they did during the dictator game. The specific nature of this question will make it straightforward to detect off-topic responses. A comment must be judged as off-topic, non-sensical, or non-English by two members of the research team to be excluded.

4. A respondent does not agree to continue with the study when asked if they wish to continue taking part in the study at the end of the baseline study, or in private correspondence with the researchers.

5. A respondent completes the baseline study using an IP address from outside Canada or the United States, or that appears to originate from a VPS or other suspicious source.

6. Technical difficulties prevent a respondent from completing the baseline study.

Because obtain sufficient power to detect effects is a central aim of this study, the investigators will replace respondents who are removed for reasons 1-5 in a rolling fashion. In the case of technical failure (#6), the first approach will be to resolve the issue and administer the baseline survey to the same participant. If this is not possible, a replacement will be recruited.

• Minimum Eligible Age: 18 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: Yes

Sponsors

University of Toronto

OTHER

Sponsor Role: lead

Responsible Party

Andrew Miles

Assistant Professor

Responsibility Role: PRINCIPAL_INVESTIGATOR

Principal Investigators

Andrew Miles, PhD

Role: PRINCIPAL_INVESTIGATOR

University of Toronto

Locations

Online, Amazon's Mechanical Turk

Toronto, Ontario, Canada

Countries

Canada

References

Morgan J, Farsides T. Measuring Meaning in Life. J Happiness Stud. 2009;10: 197-214. doi:10.1007/s10902-007-9075-0

Reference Type: BACKGROUND

Kohout FJ, Berkman LF, Evans DA, Cornoni-Huntley J. Two shorter forms of the CES-D (Center for Epidemiological Studies Depression) depression symptoms index. J Aging Health. 1993 May;5(2):179-93. doi: 10.1177/089826439300500202.

Reference Type: BACKGROUND

PMID: 10125443 (View on PubMed)

Bjelland I, Dahl AA, Haug TT, Neckelmann D. The validity of the Hospital Anxiety and Depression Scale. An updated literature review. J Psychosom Res. 2002 Feb;52(2):69-77. doi: 10.1016/s0022-3999(01)00296-3.

Reference Type: BACKGROUND

PMID: 11832252 (View on PubMed)

Lyubomirsky S, Lepper HS. A Measure of Subjective Happiness: Preliminary Reliability and Construct Validation. Soc Indic Res. 1999;46: 137-155.

Reference Type: BACKGROUND

Kennedy R, Clifford S, Burleigh T, Waggoner PD, Jewell R, Winter NJG. The shape of and solutions to the MTurk quality crisis. Polit Sci Res Methods. 2020; 1-16. doi:10.1017/psrm.2020.6

Reference Type: BACKGROUND

Wood D, Harms PD, Lowman GH, DeSimone JA. Response Speed and Response Consistency as Mutually Validating Indicators of Data Quality in Online Samples. Soc Psychol Personal Sci. 2017;8: 454-464. doi:10.1177/1948550617703168

Reference Type: BACKGROUND

Study Documents

Document Type: Individual Participant Data Set

Not yet available, but will be posted once study is complete.

View Document

Document Type: Statistical Analysis Plan

The investigators intend to publish this study as a registered report. The analysis plan is current as of this registration, but will likely change during the review process.

View Document

Document Type: Informed Consent Form

View Document

Document Type: Analytic Code

Will be posted after study is complete.

View Document

Other Identifiers

00039312

Identifier Type: -

Identifier Source: org_study_id