Psychology Notes HQ Editorial Staff, Author at The Psychology Notes Headquarters

Social Loafing: Why People Put In Less Effort in Groups (And How to Fix It)

Social loafing is the tendency to exert less effort on a task when working as part of a group than when working alone. The effect is well-documented, surprisingly consistent across contexts, and deeply familiar to anyone who has survived a frustrating group project. Psychologists have studied it since the 1880s, and what they’ve found goes well beyond laziness — social...

The Overjustification Effect: Why Rewards Can Backfire on Motivation

The overjustification effect occurs when offering an external reward for an activity someone already enjoys causes their intrinsic motivation to decline — sometimes called the undermining effect for exactly this reason. First demonstrated in Deci’s early laboratory work and later confirmed in Lepper, Greene, and Nisbett’s landmark 1973 study, overjustification effect psychology reveals a counterintuitive truth: adding a reward doesn’t...

Goal Setting Theory: Locke & Latham’s 5 Principles and How They Drive Motivation

Goal setting theory, developed by Edwin Locke and expanded with Gary Latham, proposes that specific, challenging goals — paired with adequate feedback — consistently produce better performance than vague or easy targets. First articulated by Locke in the 1960s and formalized in their landmark 1990 framework, the theory has become one of the most empirically supported models in motivational psychology....

Cialdini’s Principles of Persuasion: The 6 Triggers Behind Every Yes

Cialdini’s principles of persuasion are six psychological triggers that explain why people comply with requests, change their minds, or make purchases they hadn’t planned on. Identified by social psychologist Robert Cialdini in his landmark 1984 book Influence, these principles of persuasion are grounded in universal human tendencies — cognitive shortcuts that make everyday decision-making faster but also surprisingly predictable. Whether...

In-Group vs Out-Group Psychology: The Bias You Don’t Notice

Two strangers meet, discover they went to the same college, and suddenly trust each other more within thirty seconds than they trusted anyone in the room a minute earlier. Nothing about either person actually changed. What changed is a mental switch that flips the instant your brain sorts someone into “one of us.” The in group vs out group divide...

Self-Determination Theory: Deci & Ryan’s 3 Core Needs That Drive Intrinsic Motivation

Self-determination theory (SDT) is a psychological framework developed by Edward Deci and Richard Ryan that explains human motivation through three core psychological needs: autonomy, competence, and relatedness. First formally outlined in the 1980s, SDT proposes that people are most engaged, productive, and psychologically healthy when these needs are genuinely satisfied. Unlike earlier models that treated motivation as a simple dial...

Author: Psychology Notes HQ Editorial Staff