Mental
Conditions
Brief summary
A trial that tests whether implementation intentions improve sleep among adoelescents.
Interventions
BEHAVIORALIf-then plans
If-then plans (or implementation intentions) involve linking in memory critical situations (e.g., temptations) with appropriate responses (e.g., substitution)
OTHERControl
Exposure to critical situations (e.g., temptations) and appropriate responses (e.g., substitution) but not linked in memory
Sponsors
University of Manchester
Study design
Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
SINGLE (Investigator)
Eligibility
Sex/Gender
ALL
Age
12 Years to 16 Years
Healthy volunteers
Yes
Inclusion criteria
* Aged 12-16 years
Exclusion criteria
* Unable or unwilling to complete the question
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Achieving recommended sleep levels | 1 month | The main outcome measure was adapted from the Pittsburgh Sleep Quality Index (Buysse, Reynolds, Monk, Berman, & Kupfer, 1989), and was designed to tap both quantity and quality of sleep. Sleep quantity was assessed by asking: How many hours of actual sleep do you normally get on a night before school? \_\_\_\_\_\_\_\_\_ hours, What time do you normally go to bed on a night before school? \_\_\_\_\_\_\_\_\_\_ pm, and What time do you normally get up on a school day? \_\_\_\_\_\_\_\_\_\_ am. |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Self-regulation | 1 month | Sniehotta, Nagy, and Scholz's (2006) six items were used to capture three facets of action control (Karoly, 1993) on 7-point (+1 to +7) strongly disagree-strongly agree scales. (e.g., During the last month I constantly monitored my sleep on the nights before school) |
| Habit | 1 month | Gardner et al.'s (2012) self-report behavioral automaticity index, which consists of four items measured on 7-point strongly disagree-strongly agree scales. The items are: Getting 9 hours' sleep on the nights before school is something I do automatically, Getting 9 hours' sleep on the nights before school is something I do without thinking, Getting 9 hours' sleep on the nights before school is something I do without having to consciously remember, and Getting 9 hours' sleep on the nights before school is something I start doing before I realize I'm doing it. |
Outcome results
None listed