The CDAT has been shown to be valid, reliable, and highly effective as a standardized screening and identification instrument for artistically talented students (Clark & Zimmerman, 2004) and has been adapted for use in research with Chinese students (e.g., Ka, 1999).
The relationship between students' accuracy scores in identifying impossible figures and their drawing abilities judged by two visual artists on their performance in two CDAT drawing tasks was examined in relation to age and general spatial ability.
The house and the running-person drawing tasks adapted from CDAT were used in this study.
In addition to these self-report data, students also completed two 15-minute drawing tasks based on the CDAT tasks of drawing a house and a running person.
In this connection, the use of a standardized measure such as CDAT, which has been found to be reliable and valid based on four drawing tasks, could be helpful.
To evaluate whether each of the figures used could discriminate students with high drawing abilities from those with low drawing abilities, global expert ratings elicited from two visual artists of the students' two CDAT drawing tasks were used to define the drawing-ability groups for comparison.
where (i) CDAT
equals one for articles having data analysis, and zero otherwise; (ii) LMNSRC equals one if the citing JSTOR article cites an AER source article containing "lemma" and/or "multiple equilibria," and equals zero otherwise; (iii) YR80, YR85, YR90, and YR95 are dummies variables for 1980, 1985, 1990, and 1995; (19) and (iv) c is the constant term.
It is working to help people like Chris that has seen the CDAT team grow from a small counselling group to a pioneering agency working with homelessness support groups, social workers and prison intervention programmes.
Recovered alcoholic Chris joined fellow former alcoholic John Lewis, 55, and former drug addict Tracey Alderman, 33, to describe how CDAT helped them claw back their lives from the grip of dependency.
They were praised by Yaina Samuels, a co-ordinator at addiction support charity NewLink Wales, which works with CDAT.