The present study aims to examine the effectiveness of descriptive social norm nudges and pictorial social norm nudges in improving mental health help-seeking intention compared to educational information.
This study is a three-arm randomised controlled trial (RCT) in 540 older adults aged 60 years and above recruited through NGOs, testing the utility of revised TPB with baseline data, and the effectiveness of descriptive social norm-nudges (intervention group 1) and pictorial social norm- nudges (intervention group 2) comparing to traditional mental health education (control). Participants will be evenly randomised and receive 1 message/picture per day consecutively for 2 weeks. Researchers blind to group allocation will interview participants at baseline (T0), 2 weeks (post-intervention, T1), and 12 weeks (follow-up, T2). The primary outcomes are changes in subjective norms and help-seeking intention assessed using a revised Chinese version of the theory of planned behaviour questionnaire (C-TPB); secondary outcomes include perceived behavioural control, help-seeking attitude, perceived barriers to help-seeking (C-TPB subscales), and mental health assessed by PHQ-9, GAD-7 and UCLA-3.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
PREVENTION
Masking
NONE
Enrollment
540
A set of messages with descriptive social norm nudges sent to participants.
A set of messages with pictorial social norm nudges sent to participants.
Traditional mental health education information disseminated to participants.
The Hong Kong Polytechnic University
Hong Kong, Hong Kong
RECRUITINGSubjective norms toward mental health help-seeking
Subjective norms toward mental health help-seeking will be measured by six items adapted from the validated Chinese version of the TPB questionnaire (C-TPB) . The three items will measure descriptive norms describing what society, in general, does when facing mental health challenges, and the other three items will measure social norms describing what the significant others of the participant would do. Responses will be rated on a 6-point Likert scale, with higher scores indicating higher levels of subjective norms about mental health help-seeking.
Time frame: Baseline (T0), post-intervention (T1, two weeks after T0), and to 12 weeks after the baseline (T2)
Mental health help-seeking intention
Mental health help-seeking intention will be measured on a 3-item subscale of C-TPB. Responses will be rated on a 6-point Likert scale, with higher scores indicating higher levels of help-seeking intention.
Time frame: Baseline (T0), post-intervention (T1, two weeks after T0), and to 12 weeks after the baseline (T2)
Perceived behavioural control
Perceived behavioural control will be measured on a 3-item subscale of the C-TPB. Responses are rated on a 6-point Likert scale, with higher scores indicating higher levels of behavioural control.
Time frame: Baseline (T0), post-intervention (T1, two weeks after T0), and to 12 weeks after the baseline (T2)
Help-seeking attitude
Help-seeking attitude will be measured on a 5-item subscale of C-TPB, items will be measured on a 6-point semantic differential scale, with higher scores indicating a more positive attitude towards help-seeking.
Time frame: Baseline (T0), post-intervention (T1, two weeks after T0), and to 12 weeks after the baseline (T2)
Perceived barriers to help-seeking
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Perceived barriers to help-seeking will be measured by a 6-item scale adapted from the Chinese American Psychiatric Epidemiological study (CAPES), responses are rated on a 6-point Likert scale, with higher scores indicating more significant perceived barriers to help-seeking.
Time frame: Baseline (T0), post-intervention (T1, two weeks after T0), and to 12 weeks after the baseline (T2)
Depressive symptoms
Depressive symptoms will be measured with the Patient Health Questionnaire (PHQ-9). It is a 9-item instrument that incorporates depression diagnostic criteria with other leading major depressive symptoms and rates the frequency of the symptoms, factoring into the scoring severity index. PHQ-9 scores of 5-9, 10-14, 15-19, 20 and above represent mild, moderate, moderately severe, and severe depression, respectively.
Time frame: Baseline (T0), post-intervention (T1, two weeks after T0), and to 12 weeks after the baseline (T2)
Anxiety symptoms
Anxiety will be measured with the Generalised Anxiety Disorder 7-item scale (GAD-7). It is a 7-item scale; responses to each item are rated on a 4-point Likert scale and range from 0 to 3. It taps on the most prominent diagnostic features for GAD, and scores of 5, 10, and 15 are taken as the cut-off points for mild, moderate, and severe anxiety, respectively.
Time frame: Baseline (T0), post-intervention (T1, two weeks after T0), and to 12 weeks after the baseline (T2)
Loneliness
Loneliness will be measured with the UCLA Loneliness Scale (UCLA-3). It is a 3-item scale measuring an individual's perceived loneliness. Each item is evaluated with scores ranging from 0 (never) to 3 (often), the total score is the sum of all items, and a higher score indicates a higher level of perceived loneliness.
Time frame: Baseline (T0), post-intervention (T1, two weeks after T0), and to 12 weeks after the baseline (T2)