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Three ICT indices and their observed measures

Three indices of ICT use and familiarity are derived from a number of observed measures collected as part of the IALSS survey. These ICT related measures are examined using exploratory factor analysis with principal components specified as the method. Subsequently, confirmatory factor analysis is used to validate the three models. Index scores are then derived using a Rasch scaling approach. Scores for each index are expressed as standardized scores on a 10-point scale, with a mean of 5 points and a standard deviation of 1.5 points.

The index scores are estimated on the basis of the pooled between-country data set for the population 16 to 65 years, derived from all six countries participating in the ALL survey. The index scores for Canada and the provinces and territories are calculated relative to the standardized international mean score, set at 5 points for each index.

The underlying variables used to construct the three measures are outlined below:

1. Index of perceived usefulness and attitude toward computers

Please tell me whether you strongly agree, agree, disagree, or strongly disagree with each of the following statements:

• Computers have made it possible for me to get more done in less time
• Computers have made it easier for me to get useful information
• Computers have helped me to learn new skills other than computer skills
• Computers have helped me to communicate with people
• Computers have helped me reach my occupational (career) goals

2. Index of diversity and intensity of Internet use

In a typical month, how often did you use the Internet for the following purposes? (Daily, a few times a week, a few times a month, never)

• Electronic mail (email)
• Participate in chat groups or other on-line discussions
• Shopping (including browsing for products or services but not necessarily buying)
• Banking
• Formal education or training (part of a formal learning activity such as a course or a program of studies)
• Obtain or save music
• Read about news and current events
• Search for employment opportunities
• Search for health related information
• Search for weather related information
• Search for government information
• Playing games with others
• General browsing
• Other purposes; specify
• In a typical month, how many hours did you use a computer at home?