Rosa applied for a job as a nursing assistant in a nursing home and was happy to find out that she was selected for an interview. Rosa answered the questions in a professional manner, and the interview seemed to go well. Then the interviewer asked Rosa to hand-write a paragraph about herself and her background. Rosa later got a call explaining that she did not get the job because her handwriting showed character traits that don't align with what the nursing home seeks.

What might have gone wrong in this scenario? Is there any validity in handwriting analysis or personality testing as part of company's practices? Does the practice violate any labor laws and if so which ones?