Clarissa develops a new measure of self-esteem. Her measure contains 6 items asking people how much they like themselves. Clarissa reports in her journal article that the scale has high reliability, Chronbach's alpha = .83. This means:
1) The measure is valid and accurately measures self-esteem
2) The measure is not valid and does not accurately measure self-esteem
3) The measure is reliable and consistent in measuring self-esteem
4) The measure is unreliable and inconsistent in measuring self-esteem