As the results of Table 1 reveal, participants in experimental (online games) group (M= 14.75, SD= 3.22)
significantly outperformed [t= 2.40] those in control group (M= 11.41, SD= 3.22). Therefore, the null-hypothesis
indicating that there is no significant difference between scores in experimental and control groups after the
treatment can be rejected with 95 per cent confidence and the researcher hypothesis is supported. As a result it can
be suggested that online games can be viewed as an effective tool in English classes in general, and in vocabulary
teaching classes in specific.