Hello! i am having a hard time conducting a one way ANOVA test USING spss.

i am new to using SPSS. and i think maybe im not enetering everything correctly into variable and data view. I was able to input all the data. but now the issue im having is conducting the anova. When i follow the steps, the "therapy" is not available to move into the factor window. only the "response" is available to move over to dependent list.

can you please show me step by step of how to enter the following data into SPSS, in the data view and variable view, and how to conduct the ANOVA.

This is the assingment data

ANOVA

Imagine that a psychologist working with veterans with post-traumatic stress disorder wants to compare the effectiveness of several therapies focused on reducing symptoms of anxiety. The psychologist randomly sampled 20 veterans who recently returned from combat and randomly assigned each of them to receive one of four interventions for 8 weeks. A survey was used to measure the participants' anxiety at the end of the 8 weeks. Higher anxiety scores indicate more anxiety.

Enter the following dataset into SPSS, then conduct a one-way ANOVA

Anxiety scores for five veterans who received behavioral therapy: 104, 101, 103, 102, 104

Anxiety scores for five veterans who received cognitive therapy: 101, 102, 101, 105, 103

Anxiety scores for five veterans who received biofeedback therapy: 100, 102, 104, 101, 100

Anxiety scores for five veterans who received medication therapy: 104, 107, 106, 105, 106