What did Bandura mean by 'self efficacy'?

Are there other concepts in personality theory that can mean the same thing?

Answers:
Bandura's idea of self efficacy are basically the strength and belief in oneself to be able to do something. For example drinkers with high self efficacy levels (re their drinking) are more likely to be able to abstain from alcohol.

'I have no control of my drinking' eg of low efficacy statement
I'll tell you what it says in my A-Z Psychology handbook (second edition):

Self-efficacy is a term referring to the belief that we can perform adequately in a given situation. When applied to health, self-efficacy beliefs are important in shaping unhealthy behaviours into more healthy ones. For example, we may choose not to diet because we believe that for us, dieting will not work or we will not able to keep to the strict regime. Self-efficacy may also be based on our observations of others' performance ('If she couldn't do it, what hope do I have?') or on our observations of our own emotional states ('I wouldn't be very good company, I'm a bit down at the monent').

Hope that helps.
The simple explanation is that if you believe that you posses certain triats (behaviours) you will eventually display these traits.

the easiest example would be; if you believe that you will fail at something, you will.

similar personality theories would be Locus of control. this is whether you consider the actions in your life to be affected by internal (you) or external (everything else) sources that affect your life
Expectancy, although I would contend that it is not the same concept.but some treat them as the same.

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