Magister Artium (Psychology) - MA(Psych) / The purpose of the present study was to gather further external validity evidence towards the
validity argument for an instrument designed to measure individual and contextual factors
associated with adolescent substance use in low socio-economic status communities in the Western
Cape, South Africa. The South African Substance Use Contextual Risk Instrument (SASUCRI)
measures adolescents’ subjective experiences of their own psycho-social and their communities’
functioning. The present study uses secondary data analysis in order to further evaluate its external
validity. Both content and structural evidence for the instrument has been gathered in the larger
study in which the present study is located. Validity theory was used as the theoretical framework
for the gathering of the different types of evidence in support of the validity argument for this
instrument. The study employed non-probability purposive sampling to select schools from three
education districts from which twenty-six schools were selected where the sample total was
N=1959. English and Afrikaans versions of the instrument were administered to English- and
Afrikaans home language, school-going adolescents, aged 12 to 21 years. All ethical standards were
maintained throughout the research process. External evidence procedures were conducted using
Discriminant Function Analysis (DFA) to evaluate the extent to which the instrument could
discriminate between substance using and non-using adolescents. The DFA revealed that nine
SASUCRI sub-scales totals can act as significant predictors to substance use among adolescents
based on the predictive validity of sub-scales.
| Identifer | oai:union.ndltd.org:netd.ac.za/oai:union.ndltd.org:uwc/oai:etd.uwc.ac.za:11394/5774 |
| Date | January 2017 |
| Creators | Bester, Kyle John |
| Contributors | Florence, Maria, Isaacs, Serena |
| Publisher | University of the Western Cape |
| Source Sets | South African National ETD Portal |
| Language | English |
| Detected Language | English |
| Rights | University of the Western Cape |
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