Illusion and Types of Illusions | Notes | Unit 4 | Class 11 | Psychology

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Welcome to our comprehensive guide on “Illusion and Types of Illusions,” a key topic from the book of Psychology Class 11 Unit 4 of the West Bengal Board (WBCHSE). In this studymat, you’ll find detailed Notes from Psychology Class 11 Chapter 4. This is designed to clarify your understanding and help you excel in your Class 11 Psychology Semester 1 Exam. Additionally, this study material is a valuable resource for competitive exams for psychology students. Stay tuned as we dive into Psychology Class 11 Chapter 4 MCQs with Answers to enhance your grasp of this essential subject further.

Illusion and Types of Illusions | Notes

Illusion

An Illusion happens when we misinterpret what we see, hear, or feel. This means there’s a difference between what’s actually there and how we perceive it. These misinterpretations can happen to anyone and are usually the same for everyone. Illusions are interesting because they show us that our brain sometimes makes mistakes when trying to make sense of the world around us.

Types of Illusions

Universal Illusions:

Universal Illusions are experienced by everyone in the same way. For Example, when you look at train tracks in the distance, they seem to come together even though we know they stay parallel. These types of illusions are called universal or permanent illusions because they don’t change with practice or experience.

Personal Illusions:

Personal Illusions vary from person to person. What one person finds confusing or tricky to understand might not be the same for another person. These illusions are influenced by individual experiences and perceptions.

Geometrical Illusions:

Geometrical Illusions involve shapes and lines. A well-known example is the Müller-Lyer illusion, where two lines of the same length appear to be different lengths because of the direction of the arrowheads at the ends.

Apparent Movement Illusion:

Apparent Movement Illusion makes us think something is moving when it’s not. For example, when we watch a movie, a series of still images are shown quickly one after the other, but our brain sees them as moving. This is also why flickering lights can sometimes seem to move.

These illusions help us understand that our perceptions can be influenced by many factors, including our environment and past experiences.

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