non parametric test

.Research Question: is there a difference between levels of discrimination towards individuals who have received psychiatric treatment before and after viewing an intervention video show a person who experience hearing voices?

Hypothesis: levels of discrimination towards individuals who have received psychiatric treatment will be lower after viewing an intervention video showing personal experiences of hearing voices.

NB: i have already done the spas and below are the results, but i will be sending more information like a video link and a graph and table if the writer can send me his/her email ASAP.
Participants were 145,
men 50
female 95
male percentage 34% and female 65%.

the mean age of the partcipertant was 32 (M =32.66,SD=10.21)

Value of t:( 144)=7.36
Degrees of freedom :144

p.value is P <0.01

please make sure you only use books and journals for referencing .