Table III.
Summary Statistics of Child Reports
| Mean | SD | N | |
|---|---|---|---|
| Female | 0.495 | 0.500 | 4,643 |
| Age | 12.187 | 3.003 | 4,637 |
| Computer and Time use | |||
| Computer Use (hours per week) | 5.465 | 6.349 | 4,384 |
| Computer for Games everyday | 0.189 | 0.391 | 4,606 |
| Computer for Homework everyday | 0.015 | 0.120 | 4,614 |
| Computer for Ed Software everyday | 0.003 | 0.051 | 4,611 |
| Computer for Web/Email everyday | 0.052 | 0.221 | 4,614 |
| Homework > 1hr everyday | 0.682 | 0.466 | 4,539 |
| TV > 1hr everyday | 0.759 | 0.428 | 4,512 |
| Academic outcomes | |||
| Math GPA | 7.493 | 1.512 | 4,279 |
| Romanian GPA | 7.653 | 1.471 | 4,302 |
| English GPA | 7.717 | 1.539 | 3,476 |
| Behavior GPA | 9.910 | 0.427 | 4,367 |
| Cognitive and Computer Assessments | |||
| Raven's Progressive Matrices Test | −0.059 | 0.999 | 4,628 |
| Computer Test (raw) | 3.352 | 2.810 | 4,375 |
| Computer Operation Fluency (raw) | 2.739 | 1.135 | 4,620 |
| Applications Fluency (raw) | 2.761 | 1.375 | 4,620 |
| Web Fluency (raw) | 2.163 | 1.359 | 4,620 |
| Email Fluency (raw) | 2.334 | 1.329 | 4,620 |
| Non-cognitive outcomes | |||
| Rosenberg Index (raw) | 19.050 | 3.750 | 4,085 |
| Health index | 3.401 | 0.659 | 4,602 |
| Hand pain | 0.081 | 0.273 | 4,546 |
| Overweight | 0.086 | 0.281 | 4,483 |
| Smoking | 0.047 | 0.211 | 4,597 |
| Drinking | 0.065 | 0.247 | 4,611 |
Notes: SD is the standard deviation and N is the sample size. Child gender and age are derived from the parental reports. Computer use for games, homework, education, and web/email are indicator variables for daily activites. Homework and TV are indicator variables for daily activity of more than 1 hour per day. GPAs represent raw scores ranging from 1 to 10. The Raven's Progressive Matrices test is standardized with a mean of 0 and standard deviation of 1. The computer test represents raw scores from 1 to 12 but it is normalized to a mean of 0 and standard deviation of 1 in the graphs and regression tables. The fluency scores represent raw responses ranging from 1 (not at all fluent) to 5 (very fluent), again normalized with a mean of 0 and standard deviation of 1 in the graphs and regression ables. Rosenberg index is a raw score ranging from from 1 to 30 with higher scores indicating lower self-esteem, also normalized to a mean of 0 and standard deviation of 1 in the graphs and regression tables. Health status is self-reported health status ranging from 1 (poor) to 5 (very well). Hand pain is an indicator variable for any problems with pain in the hands. Overweight is an indicator variable for self-reported perception of being overweight. Smoking and drinking are indicator variables for any report of smoking or drinking during the past year. Source: 2009 Euro 200 survey.