Substitution {NormData}

Substitution test data

Description

Substitution tests are speed-dependent tasks that require the participant to match particular signs (symbols, digits, or letters) to other signs within a specified time period. The LDST is an adaptation of earlier substitution tests, such as the Digit Symbol Substitution Test (DSST; Wechsler, 1981) and the Symbol Digit Modalities Test (SDMT; Smith, 1982). The LDST differs from other substitution tests in that the key consists of 'over-learned' signs, i.e., letters and digits. These are simulated data that are based on the results described in Van der Elst et al. (2006) (see Table 2).

Usage

data(Substitution)

Format

A data.frame with 1765 observations on 5 variables.

Id

The Id number of the participant.

Age

The age of the participant, in years.

Gender

The gender of the participant, coded as a factor with levels Male and Female.

LE

The Level of Education of the test participant, coded as a factor with levels Low, Average and High.

LDST

The test score on the LDST (written version), i.e., the number of correct substitutions made in 60 seconds. A higher score reflects better performance.