Sleep Intervention

Not Applicable

Completed

• Conditions: Mental
• Interventions: Other: Control; Behavioral: "If-then" plans

• Registration Number: NCT03047356
• Lead Sponsor: University of Manchester

Brief Summary

A trial that tests whether implementation intentions improve sleep among adoelescents.

Detailed Description

Not available

Study Timeline

• Study Start: 2016-03-04
• Primary Completion: 2016-04-06
• Study Completion: 2016-04-06
• Status Verified: 2017-02
• Study First Submitted: 2017-02-03
• Study First Submitted QC: 2017-02-06
• Last Update Submitted: 2017-02-06
• Study First Posted: 2017-02-08
• Last Update Posted: 2017-02-08

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 151

Inclusion Criteria

• Aged 12-16 years

Exclusion Criteria

• Unable or unwilling to complete the question

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
Control	Control	Participants are presented with "ifs "(critical situations) and "thens" but are not asked to form "if-then" plans.
First-person "if-then" plan	"If-then" plans	Participants are asked to form "if-then" plans and the instructions are presented in the first person ("if I...then I..."). "Ifs" are critical situations, "thens" are appropriate responses.
Second-person "if-then" plan	"If-then" plans	Participants are asked to form "if-then" plans and the instructions are presented in the second person ("if you...then you..."). "Ifs" are critical situations, "thens" are appropriate responses.

Primary Outcome Measures

Name	Time	Method
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 Outcome Measures

Name	Time	Method
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."
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")