Frank was on his way to campus

when a group of four armed men encircled and dispossessed him of his laptop,

cell phone and a wallet with bank cards. Since this incident, Frank has

struggled to cope with academic work and has experienced a drop in

marks. In the same month that he was robbed, Frank also missed three important

lectures, which significantly contributed to the drop in his marks. Which of

the following factors can be used to judge abnormal behaviour in Frank’s

behaviour?