Research indicates that playing a prosocial video game tends to increase prosocial behaviors (Greitemeyer & Osswald, 2010). In a similar experiment, participants were assigned to play a prosocial, a violent (antisocial), or a neutral video game. Near the end of each session, the experimenter accidentally spilled a box of pencils on the floor and then recorded whether the participant stopped to help pick them up. The data are as follows:
Prosocial | Violent | Neutral | ||
Helped | 12 | 7 | 8 | 27 |
Did not Help | 3 | 8 | 7 | 18 |
15 | 15 | 15 |
Do the data indicate a significant relationship between the type of game played and helping behavior? Test with α = .05.
Given info:
The given table shows that type of game played and the helping behaviour.
Calculation:
Observed values:
Pro-social | Violent | Neutral | Total | |
Helped | 12 | 7 | 8 | 27 |
Did not help | 3 | 8 | 7 | 18 |
Total | 15 | 15 | 15 | 45 |
Expected values
Pro-social | Violent | Neutral | Total | |
Helped | 9 | 9 | 9 | 27 |
Did not help | 6 | 6 | 6 | 18 |
Total | 15 | 15 | 15 | 45 |
Test statistic:
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