Week 14 Class Activity
Data
Download ASAP Sleep & Mood Data (.csv)
The Consultancy Brief
To: Junior Statistical Consultants
From: Principal Investigator, ASAP Study
Re: Data Analysis Request
Our research team has collected longitudinal data on 400 adolescents (Variables described in the Data Dictionary ). We have cleaned the data, but we are unsure which relationships are significant. Since you haven’t looked at the data, please think about what may be a relevant question to investigate. Once you have that question, we will approve it and then you can perform your data analysis followed by a “report” back to us.
Thank you,
Dr. E. Brown
Data Dictionary
| Variable Prefix | Meaning |
| T1_ | Time 1 (Baseline, Ages 7-9) |
| T2_ | Time 2 (1 Year Later) |
| T3_ | Time 3 (2 Years Later) |
| Variable Name | Description | Scale |
ID |
Participant ID | 1-400 |
Sex |
Biological Sex | 0=Male, 1=Female |
SES |
Socioeconomic Status | Z-score (0=Avg, High=Rich) |
Age |
Age in years | Continuous |
Puberty |
Pubertal Development | 0-8 (0=Child, 8=Adult) |
SleepDur |
Objective Sleep Duration | Hours (e.g., 9.5) |
SleepQual |
Subjective Sleep Quality | 0-20 (High = BAD sleep) |
PeerStress |
Social Stress | 0-20 (High = Stressed) |
AcadStress |
School Stress | 0-20 (High = Stressed) |
Dep |
Depression Symptoms | 0-60 (High = Depressed) |
Anx |
Anxiety Symptoms | 0-21 (High = Anxious) |
Potential Questions
Below are some questions that we may explore if we have time.
Q1 (The “Socio-Economic Sleep Gap”): Does Socioeconomic Status (SES) predict better objective sleep duration (
SleepDur) at Baseline (T1)?Q2 (The “Stress Source” Debate): At Age 10 (T2), which is the stronger predictor of Anxiety:
PeerStressorAcadStress?Q3 (The “Puberty Effect”): Does advanced Puberty status (
T1_Puberty) predict lower sleep duration (T1_SleepDur), even when controlling forT1_Age?Q4 (The “Anxiety Trap”): Does Academic Stress (
AcadStress) lead to Depression (Dep) because it increases Anxiety (Anx)? (Analyze at T1 or T2).Q5 (The Original Hypothesis): Does Poor Sleep Duration at T1 lead to Depression at T3 via the mechanism of Peer Stress at T2?
Q6 (The “Gendered Buffer”): Does the relationship between Academic Stress (
T2_AcadStress) and Depression (T3_Dep) depend on the child’s Sex? (e.g., Are girls more affected by academic stress?)Q7 (The “Biological Sensitizer”): Does Puberty (
T2_Puberty) amplify the effect of Peer Stress (T2_PeerStress) on Depression (T3_Dep)?