Keyword Analysis & Research: most significant threat to internal validity

Keyword Analysis

Keyword	CPC	PCC	Volume	Score	Length of keyword
most significant threat to internal validity	1.29	0.8	9216	55	44
most	1.84	0.4	5056	44	4
significant	0.36	0.7	6517	92	11
threat	1.85	0.1	363	54	6
to	1.36	0.7	4814	69	2
internal	0.1	0.3	2756	68	8
validity	0.89	1	101	28	8

Keyword	CPC	PCC	Volume	Score
most significant threat to internal validity	0.65	0.1	8544	58