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Efficacy is the ability to perform a task to a satisfactory or expected degree. The word comes from the same roots as effectiveness , and it has often been used synonymously, although in pharmacology a distinction is now often made between efficacy and effectiveness .
Efficacy, on the other hand, is the extent to which a desired effect is achieved; the ability to produce a desired amount of the desired effect, or the success in achieving a given goal. Contrary to the term efficiency, the focus of efficacy is the achievement as such, not the resources spent in achieving the desired effect.
Self-efficacy has several effects on thought patterns and responses: Low self-efficacy can lead people to believe tasks to be harder than they actually are, while high self-efficacy can lead people to believe tasks to be easier than they are. This often results in poor task planning, as well as increased stress.
Intrinsic activity (IA) and efficacy (E max) refer to the relative ability of a drug-receptor complex to produce a maximum functional response. This must be distinguished from the affinity, which is a measure of the ability of the drug to bind to its molecular target, and the EC 50, which is a measure of the potency of the drug and which is proportional to both efficacy and affinity.
Luminous efficacy can be normalized by the maximum possible luminous efficacy to a dimensionless quantity called luminous efficiency.The distinction between efficacy and efficiency is not always carefully maintained in published sources, so it is not uncommon to see "efficiencies" expressed in lumens per watt, or "efficacies" expressed as a percentage.
Goal efficacy refers to how likely an individual is to succeed in achieving their goal. Goal integrity refers to how consistent one's goals are with core aspects of the self. Research has shown that a focus on goal efficacy is associated with happiness, a factor of well-being, and goal integrity is associated with meaning (psychology) , another ...
A person can possess self-confidence in their ability to complete a specific task (self-efficacy)—e.g. cook a good meal or write a good novel—even though they may lack general self-confidence, or conversely be self-confident though they lack the self-efficacy to achieve a particular task.
The self-efficacy and work performance literatures are helpful in distinguishing some of the other constituents necessary to develop a work self-efficacy scale. We know, for example, that it is not sufficient to "empower" workers and expect improved work performance without considering individual differences that might be differentiated by self ...