Mitchell et al. (2009): study AU 2007


Mitchell, J.; Klein, B.; Stanimirovic, R.
A Randomised Controlled Trial of a Self-Guided Internet Intervention Promoting Well-Being.
Computers in Human Behaviour, 2009, Vol. 25, 749 - 760


Participants in a strength training and controls, Australia, 2009
Survey name
Unnamed study
Non-probability self-selected
N = 160
Non Response
69% at T2; 83% at T3
Interview: Computer Assisted Personal Interview (CAPI)
T1: demographic survey and 5 mental-health and well-being questionnaires; T2: 3 groups: 2 groups filled in questionnaires after the intervention sessions that, including homework, took 3 weeks, the placebo group filled in an abreviated version of the problem solving intervention without utilizing the interactive web features, and were not asked to apply the acquired information to a real life problem.T3: After 3 months respondents were sent an e-mail request to complete the 5 mental-health and well-being questionnaires for a final time. Only respondents who completed the whole online intervention were prompted to proceed to nthe post- and follow-up phases of the study.

Happiness Measure(s) and Distributional Findings

Full text:
Self report on 20 questions.

This scale consists of a number of words that describe different feelings and emotions. Read each item and mark the appropriate answer in the space next to that word. Indicate to what extend you feel this way during the past few days:

A  nervous
B  distressed
C  afraid
D  jittery
E  irritable
F  upset
G  scared
H  ashamed
I  guilty
J  hostile
K  excited
L  active
M  determined
N  inspired
O  enthusiastic
P  alert
Q  attentive
R  proud
S  strong
T  interested

Answer options:  
1  very slightly or not at all
2  a little
3  moderately
4  quite a bit
5  extremely

Negative affect score (NAS): A to J
Positive affect score (PAS): K to T
Affect Balance Score  (ABS): PAS - NAS

Name: Watson's PANAS ('past few days' version)
Author's label:
Positive and negative affect
Unweighed average and SD at T1 computed by WDH-team
Page in publication:
Observed distribution
Summary Statistics
On original range -40 - 40 On range 0-10
18.60 -
6.22 -

Correlational Findings

Author's label Subject Description Finding Psychological strength and problem solving training Actual changes in happiness
Course, class, training group
No particular setting, recruitment on interest
Voluntary, unsolicited
Multiple sorts
Multiple treatment moments
Mixed educational methods
Problem solving training
Character strengths