Motivation PSY 101

Basic Motivational Concepts

Definition of Motivation

  • Motivation is defined as a need or desire that energizes and directs behavior, influencing how individuals act in various situations.

  • It encompasses both intrinsic and extrinsic factors that drive individuals to pursue goals or fulfill needs.

The Four Perspectives of Motivation

  • Psychologists analyze motivation through four main perspectives:

    • Instinct Theory:

    • Focuses on genetically predisposed behaviors that drive actions.

    • Suggests that certain behaviors are innate and universal across species.

    • Drive-Reduction Theory:

    • Emphasizes the role of physiological needs in creating drives that motivate behavior to restore homeostasis.

    • Arousal Theory:

    • Proposes that individuals seek an optimal level of arousal, balancing between boredom and overstimulation.

    • Maslow's Hierarchy of Needs:

    • Prioritizes needs in a pyramid structure, indicating that some needs must be met before others can be addressed.

Instincts and Evolutionary Theory

  • Instincts:

    • Defined as complex, unlearned behaviors that are fixed across a species.

    • Serve as a source of motivation.

  • Evolutionary Psychology:

    • Suggests that many human behaviors are rooted in survival instincts that have been shaped by natural selection.

Drive-Reduction Theory

  • This theory posits that unmet physiological needs create a drive that compels individuals to take action to satisfy those needs.

  • Example:

    • Hunger (a physiological need) creates a drive to seek food, illustrating the push-pull dynamic of drives and incentives.

Arousal Theory and Hierarchy of Needs

Arousal Theory

  • Arousal theory suggests that humans are motivated to seek optimal levels of arousal, rather than simply reducing it.

  • The Yerkes-Dodson Law states that moderate arousal leads to optimal performance, indicating that too little or too much arousal can hinder performance.

Maslow’s Hierarchy of Needs

  • Maslow's model categorizes human needs into a hierarchy, starting from basic physiological needs at the base to self-actualization at the peak.

  • The hierarchy includes:

    1. Physiological Needs:

    • Basic survival needs such as food and water.

    1. Safety Needs:

    • Security and protection from physical and emotional harm.

    1. Social Needs:

    • Belongingness and love, including relationships and social connections.

    1. Esteem Needs:

    • Self-esteem, recognition, and respect from others.

    1. Self-Actualization:

    • Achieving one's full potential and personal growth.

The Physiology and Psychology of Hunger

The Physiology of Hunger

  • Hunger is regulated by a homeostatic system that maintains body weight and nutritional balance.

  • Key physiological factors include:

    • Stomach Contractions:

    • Linked to hunger pangs, signaling the need for food.

    • Blood Sugar Levels:

    • Low glucose levels trigger hunger signals in the brain.

    • Appetite Hormones:

    • Hormones like ghrelin and leptin play crucial roles in hunger regulation.

Appetite Hormones

Hormone

Function

Type

Ghrelin

Increases hunger; secreted by an empty stomach

Hunger-arousing

Leptin

Decreases hunger; secreted by fat cells

Hunger-suppressing

Insulin

Controls blood glucose levels

Hunger-suppressing

PYY

Sends 'I'm not hungry' signals to the brain

Hunger-suppressing

Orexin

Hunger-triggering hormone from hypothalamus

Hunger-arousing

The Psychology of Hunger

  • Taste preferences are influenced by both biological and environmental factors, including cultural norms and personal experiences.

  • Universal preferences for sweet and salty tastes are observed across cultures, often linked to survival and energy needs.

Situational Influences on Eating

Factors Affecting Eating Behavior

  • Various situational factors that can influence eating habits include:

    • Social Facilitation:

    • The presence of others can amplify eating behaviors, leading to increased food consumption.

    • Serving Size:

    • Larger portions can lead to overeating, as individuals may consume more than needed based on visual cues.

    • Food Variety:

    • A greater variety of food options can stimulate appetite and increase consumption.

Research on Eating Behavior

  • A study by Redden et al. (2015) demonstrated that offering healthier food options (like carrots) before less healthy choices can significantly increase the consumption of those healthier options among children.

  • This highlights the importance of environmental cues in shaping dietary choices and promoting healthier eating habits.