That’s all true (although I think grade inflation is weakening those signals considerably, although strengthening the negative signak of not completing college) but it shouldn’t be legal for companies to use college as a screening tool but extremely risky legally to use test results. It should be legal to use either or legally risky to use either. It’s just crazy and hugely wasteful to tie up 4+ years of young people’s lives and tens of thousands (if not $100k+) in a signaling exercise.
It's not really "risky" legally to have aptitude or personality testing. Almost every public company in the country require them. I have taken a dozen probably... Including one for potentially buying a franchise. Briggs-Myers jumps out to me as one I have taken in nearly every interview process.
From HBR Article:
Summary.
Maybe you haven’t had to take a test as part of a hiring process, but you probably will in your next job search. About 76% of organizations with more than 100 employees rely on assessments for external hiring, especially for senior positions. It helps to know what companies are measuring and the tools they’re using.
Competence.
Aptitude tests can evaluate skills, abilities, and potential. Some companies use situational judgment tests, which present scenarios that correspond to particular roles.
Work ethic.
Self-report questionnaires can assess traits such as ambition and reliability.
Emotional intelligence.
Psychological tests, scenario-based tests, and performance tasks can measure empathy, self-awareness, and emotional literacy.
You can set yourself up for success by practicing, scheduling tests for the time of day when you’re most focused and alert, and answering questions in a way that presents your best self.
Tests aren’t just for the employer’s benefit. They can also reveal how things work in an organization and which traits matter most—invaluable information in any job search.