Jim, an early researcher in psychology, was interested in how the mind works. he focused on his own experience of pain in an effort to understand how and why people feel pain. jim was most likely a

Study sample

Explanation:

He used his case, to investigate his hypotheses. Research is usually not conducted in this way, because events called biases happen, which do not allow for reliability and certainty in the study.

depression is an ongoing sadness\lack of motivation. you feel and feel like its never going to get better. you're so sad to the point you think of death.

anxiety is an ongoing feeling of paranoia\ feeling like everyone is watching you and making fun of you. you get nervous easily and feel like the room is spinning.  

yes, they cause death every year. its a long, exhausting battle. only few make it through as sad as it sounds.

explanation: