Question about conducting multiple regression on SPSS.

#1
Hi! Friends, does anyone know how does the author proved perceived role clarity, intrinsic motivation, job involvement, and IWB were related with each other?

In his results, he made model 1 to model 6 to prove that ( the attached photo) with multiple regression analysis on SPSS. He mentioned “Table IV summarizes the multiple regression analysis results” ( showed on the picture below)

However, as we all know that we can only input 1 dependent variable in linear regression on SPSS. I don’t quite understand how he could make the table below, and prove all variable are related to each other. Does that means he needs to calculate 6 times of linear regression analysis on SPSS (ex, perceived role clarity vs intrinsic motivation; intrinsic motivation vs job involvement, job involvement vs IWB…etc) Or there is a simple way to calculate model 1 to model 6 on SPSS in one times. And where does the name model 1 to model 6 come from ? are those set by SPSS, or the author sets them on his own? 1652900190928.png 1652900205862.png