The performances of others ...

The performances of others are often selected as standards for self-improvement of abilities
 Albert Bandura

Quotes from the same author

People who believe they have the power to exercise some measure of control over their lives are healthier, more effective and more successful than those who lack faith in their ability to effect changes in their lives.
 Albert Bandura
Perceived self-efficacy also shapes causal thinking. In seeking solutions to difficult problems, those who perceived themselves as highly efficacious are inclined to attribute their failures to insufficient effort, whereas those of comparable skills but lower perceived self-efficacy ascribe their failures to deficient ability
 Albert Bandura
Self efficacious children tend to attribute their successes to ability, but ability attributions affect performance indirectly through perceived self-efficacy
 Albert Bandura
For many activities, people cannot rely solely on themselves in evaluating their ability level because such judgments require inferences from probabilistic indicants of talent about which they may have limited knowledge. Self-appraisals are, therefore, partly based on the opinions of others who presumably possess evaluative competence
 Albert Bandura
The evaluative habits developed in sibling interactions undoubtedly affect the salience and choice of comparative referents in self-ability evaluations in later life
 Albert Bandura