REACH Dictionary
Type II errors occur when researchers fail to recognize a true relationship between variables.
Lieberman, M. D., & Cunningham, W. A. (2009). Type I and type II error concerns in fMRI research: Re-balancing the scale. Social Cognitive and Affective Neuroscience, 4(4), 423–428. https://doi.org/10.1093/scan/nsp052