Table 2.

General characteristics of the participants at pre-test (N = 3036). a) Number of participants by gender, grade and country in the control and experimental groups.

Country	Grade	Control Group n = 1122 (37.0%)		Experimental Group n = 1914 (63.0%)		Number of Participants by Grade and Country
		Male	Female	Male	Female
Croatia	3	13 (52.0%)	12 (48.0%)	37 (55.2%)	30 (44.8%)	92
	4	10 (40.0%)	15 (60.0%)	37 (55.2%)	36 (49.3%)	98
	5	15 (50.0%)	15 (50.0%)	32 (50.8%)	31 (49.2%)	93
Lithuania	3	8 (33.3%)	16 (66.7%)	15 (57.7%)	11 (42.3%)	50
	4	11 (42.3%)	15 (57.5%)	8 (33.3%)	16 (66.7%)	50
Macedonia	3	24 (53.3%)	21 (46.7%)	31 (59.6%)	21 (40.4%)	97
	4	26 (52.0%)	24 (48.0%)	32 (58.2%)	23 (41.8%)	105
	5	19 (52.8%)	17 (47.2%)	23 (51.1%)	22 (48.9%)	81
Poland	3	10 (50.0%)	10 (50.0%)	51 (46.8%)	58 (53.2%)	129
	4	12 (60.0%)	8 (40.0%)	59 (51.8%)	55 (48.2%)	134
	5	16 (64.0%)	9 (36.0%)	53 (48.6%)	56 (51.4%)	134
Romania	3	22 (45.8%)	26 (54.2%)	42 (45.2%)	51 (54.8%)	141
	4	13 (31.7%)	28 (68.3%)	43 (50.0%)	43 (50.0%)	127
	5	13 (56.5%)	10 (43.5%)	42 (47.2%)	47 (52.8%)	112
Serbia	3	49 (54.4%)	41 (45.6%)	44 (50.0%)	44 (50.0%)	178
	4	32 (48.5%)	34 (51.5%)	33 (54.1%)	28 (45.9%)	127
	5	26 (51.0%)	25 (49.0%)	31 (58.5%)	22 (41.5%)	104
South Africa	3	40 (44.9%)	49 (55.1%)	41 (40.2%)	61 (59.8%)	191
	4	32 (34.8%)	60 (65.2%)	49 (48.5%)	52 (51.5%)	193
	5	55 (55.6%)	44 (44.4%)	56 (55.4%)	45 (44.6%)	200
Turkey	3	38 (45.2%)	46 (54.8%)	82 (51.9%)	76 (48.1%)	242
	4	23 (40.4%)	34 (59.6%)	62 (47.3%)	69 (52.7%)	188
	5	31 (55.4%)	25 (44.6%)	55 (48.2%)	59 (51.8%)	170
All countries	3	204 (48.0%)	221 (52.0%)	343 (49.4%)	352 (50.6%)	1120
	4	159 (42.2%)	218 (57.8%)	323 (50.1%)	322 (49.9%)	1022
	5	175 (54.7%)	145 (45.3%)	292 (50.9%)	282 (49.1%)	894
	All	538 (48.0%)	584 (52.0%)	958 (50.1%)	956 (49.9%)	3036

Note: Figures with brackets are percentages within gender, grade level, and country.