Please let me know if I am correct.
An example of criterion validity is when a human service professional uses a scale to measure risk of suicide. If the scale is valid it should correlate with the occurence of negative behaviors which harm one self
Yes, you are correct. Criterion validity is a type of validity that assesses whether a measurement or test corresponds or correlates with a certain criterion or outcome. In the example you provided, if the scale used by a human service professional to measure the risk of suicide is valid, it should correlate with the occurrence of negative behaviors that harm oneself. In other words, if the scale accurately captures the risk of suicide, it should show a correlation between higher scores on the scale and the occurrence of self-harming behaviors.
To determine criterion validity, one common approach is to compare the results of the measurement or test to an established criterion. In the case of measuring risk of suicide, the criterion could be the actual occurrence of negative behaviors that harm oneself, such as self-harm or suicide attempts. By examining the correlation between the scale scores and the occurrence of these behaviors, it can be determined whether the scale is valid in accurately assessing the risk of suicide.