A statistical approach to quantitative data validation focused on the assessment of students’ perceptions about biotechnology

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Table 4 Factor structure of the interest about biotechnology scale based on EFA and reliability analysis

		Identifiable factor	One sample t-test (test value = 3)
Item	h ²	*Interest about biotechnology*	M	SD	t(1195)	p
Q8. Rate your interest towards biotechnology	0.54	0.74	3.23	1.09	7.12	<0.001
Q9a. Listen to news about biotechnology	0.62	0.79	2.61	1.07	−12.74	<0.001
Q9b. Read articles or watch TV shows about biotechnology	0.73	0.85	2.66	1.16	−10.02	<0.001
Q9c. Search the web for subjects related to biotechnology	0.66	0.80	2.09	1.10	−28.44	<0.001
Eigenvalue		2.52
% of variance		62.90
Cronbach’s alpha		0.80
	M	2.65
	SD	0.88
	t(1195)	13.93
	p	<0.001

EFA - exploratory factor analysis. Coefficients below 0.30 were suppressed. KMO = 0.77. Bartlett’s Test of Sphericity: χ ²(6) = 1511.78, p < 0.001. h ² - communality coefficient. M - Mean. SD - Standard Deviation.