+ McGrath et al.
McGrath et al. found that 75% patients improved after systematic desensitisation therapy - suggests the treatment works for most people
+ Not time consuming
Systematic desensitisation isn’t hugely time consuming - Patients are less likely to stop or refuse he treatment, validating its use
Deeply rooted evolutionary phobias, such as a fear of the dark, do not appear to be cured by S.D. - suggests that the treatment may only work for some phobias and not more complex ones, reducing the validity of the treatment
SD can only be used to treat certain anxiety disorders - suggests other treatments are required to treat disorders that can’t be cured through SD, reducing it’s validity as a standalone treatment