A second-order factor model with two first-order factors is not identified. When you fix the metric by setting the factor variance to one, you must free the first factor loading which is set to one as the default.
See Slide 159 of the Topic 1 course handout for an example of a bi-factor input.
Katerina Gk posted on Wednesday, October 30, 2013 - 10:46 am
Is it possible to test if there is any impact only to the general factor and not to the rest factors of the bi-factor model?
If yes can I include to the input the general factor only?