Videos

Video thumbnail for Watson’s Theory of Behaviorism: Key Concepts (John B. Watson Behavioral Theory)
10:05
Icon for www.youtube.comyoutube.com › watch

Watson’s Theory of Behaviorism: Key Concepts (John B. Watson Behavioral Theory)

This video lecture discusses the key concepts of John B. Watson's theory of behaviorism. It specifically addresses the question, "What is Watson Theory of Behaviorism?". Transcript of this video lecture is available at: https://philonotes.com/2023/03/watsons-theory-of-behaviorism-key-concepts *** For more Whiteboard editions from PHILO-notes ...
YouTube
· Jan 31, 2022
Video thumbnail for Watson’s Theory of Behaviourism
05:50
Icon for www.youtube.comyoutube.com › watch

Watson’s Theory of Behaviourism

John B. Watson famously claimed that if he were to be given a dozen healthy infants, he could shape them into anything; doctors, lawyers, artists, beggars, or thieves, regardless of their background or genetic predispositions. First, he completed experiments with 8-month old Albert. He later applied his theory when raising his own children. In ...
YouTube
· Apr 30, 2020
Video thumbnail for Human Psychology: A Little Albert Experiment (John B. Watson: father of behaviourism)
02:59
Icon for www.youtube.comyoutube.com › watch

Human Psychology: A Little Albert Experiment (John B. Watson: father of behaviourism)

Dive into the intriguing world of psychological studies with our detailed exploration of the Little Albert experiment. This video kicks off with a comprehensive introduction to the experiment and its initial purpose, setting the stage for a deeper understanding of early psychological research. We then unpack the conditioning process used on ...
YouTube
· May 22, 2024
Video thumbnail for John B. Watson - The Father of Behaviourism
08:49
Icon for www.youtube.comyoutube.com › watch

John B. Watson - The Father of Behaviourism

An overview of John B. Watson's approach to behaviourism. Our Facebook page: https://www.facebook.com/socialscienceclubofficial/ Our blog: http://www.socialscienceclub.com/
YouTube
· Jan 2, 2017
Video thumbnail for Watson's Behaviorism | Theory of Learning | NET JRF | Educational Implications
15:19
Icon for www.youtube.comyoutube.com › watch

Watson's Behaviorism | Theory of Learning | NET JRF | Educational Implications

Let us understand in simple explanation with examples --What Behaviorism is according to Watson. -The Core Concepts: Environmental Influence, Conditioning, and Habit Formation. -About John B. Watson. -Watson's Experiment: The Little Albert Experiment. Educational Implications. ***This video covers all these aspects to give you a comprehensive ...
YouTube
· Sep 8, 2024
Video thumbnail for Theory of Behaviorism - John Watson
12:28
Icon for www.youtube.comyoutube.com › watch

Theory of Behaviorism - John Watson

In the experiment of Watson, Little Albert, He found out many principles that need to be applied in the classroom for successful learning
YouTube
· Sep 27, 2021
Video thumbnail for John Watson & Behaviorism | Theory & Contribution to Psychology
06:54
Icon for study.comstudy.com › academy

John Watson & Behaviorism | Theory & Contribution to Psychology

See why John Watson is called the father of behaviorism. Learn about his experiments, the theory of behaviorism, and John B. Watson's contribution to psychology.
Study.com
· Nov 20, 2014
Video thumbnail for Watson's Theory of Behaviorism
04:45
Icon for www.youtube.comyoutube.com › watch

Watson's Theory of Behaviorism

Watson's Theory of Behaviorism This is an educational video about Behaviorism, John B. Watson famously claimed that if he were to be given a dozen healthy infants, he could shape them into anything; doctors, lawyers, artists, beggars or thieves, regardless of their background or genetic predispositions. First, he completed experiments with 8 ...
YouTube
· May 2, 2021
Video thumbnail for Behaviorism theory by J B Watson
11:30
Icon for www.youtube.comyoutube.com › watch

Behaviorism theory by J B Watson

This video is about another theory of Human Development i.e. Behaviorism theory by J B Watson. J.B. Watson- father of Behaviorism. Behaviorism is science of observable behaviour. This video include the Little Albert Experiment conducted by Watson to explain classical conditioning theory. For any query, kindly mention in the comment box or ...
YouTube
· Aug 7, 2020
Video thumbnail for Classical Conditioning | John Watson
03:53
Icon for www.youtube.comyoutube.com › watch

Classical Conditioning | John Watson

In this video I explain the contributions made by John B. Watson, the father of behavioural psychology, to the study of classical conditioning. - Link to the video of Ivan Pavlov and classical conditioning: https://youtu.be/y6XPot2VvM8 - Link to the video of Ivan Pavlov and the Soviet Union: https://youtu.be/HOmOIWv2QWA
YouTube
· Jan 26, 2021
Video thumbnail for John Watson’s Theory of Behaviourism|Learning Lane
04:57
Icon for www.youtube.comyoutube.com › watch

John Watson’s Theory of Behaviourism|Learning Lane

#film_theory #media_theory #media_study #learning_lane #learning_by_doing #sprouts_school #mental_health #study_tips #confirmation_bias #kahneman John B. Watson famously claimed that if he were to be given a dozen healthy infants, he could shape them into anything; doctors, lawyers, artists, beggars or thieves, regardless of their background or ...
YouTube
· Jul 16, 2021
Video thumbnail for The Little Albert Experiment | Watson & Rayner (1920)
10:25
Icon for www.youtube.comyoutube.com › watch

The Little Albert Experiment | Watson & Rayner (1920)

This is a breakdown of the famous 'Little Albert' Psychology Experiment by John Watson and Rosalie Rayner using Classical Conditioning to instil a new fear in a mentally stable child, explaining the methods and all of the ethical issues associated with it. The famous unethical experiment was questioned for many years, and would not happen today ...
YouTube
· Feb 18, 2021
Video thumbnail for John B. Watson & Behaviorism #psychology #behaviorism #johnbwatson #psychologyfacts #openstax
00:29
Icon for www.youtube.comyoutube.com › watch

John B. Watson & Behaviorism #psychology #behaviorism #johnbwatson #psychologyfacts #openstax

YouTube
· May 8, 2024
Video thumbnail for Behaviourism and Theories of Learning of John Locke and J B Watson
12:07
Icon for www.youtube.comyoutube.com › watch

Behaviourism and Theories of Learning of John Locke and J B Watson

In this video we will discuss about Behaviourism and Theories of Learning of John Locke and J B Watson Hope you like this session. If you like this session, then please do Like, Share, Subscribe and Press Bell icon 🔔 for more videos by Prateek Shivalik. Thank you. You can also stay in touch with Prateek Shivalik Sir through his Android and ...
YouTube
· Nov 27, 2018
Video thumbnail for The Little Albert Experiment
05:30
Icon for www.youtube.comyoutube.com › watch

The Little Albert Experiment

Book on the subject: https://amzn.to/35OtWuP This video gives a quick overview of the Little Albert experiment, along with the criticisms raised against this study, and the aftermath for this studies' subject.
YouTube
· Sep 28, 2019
Video thumbnail for Behaviorism: Pavlov, Watson, and Skinner
04:58
Icon for www.youtube.comyoutube.com › watch

Behaviorism: Pavlov, Watson, and Skinner

An educational video about Behaviorism: Ivan Pavlov, John Watson, and B.F. Skinner. This video covers Classical and Operant conditioning. Check out part two -- https://www.youtube.com/watch?v=eLaa8cgljKk Created using PowToon -- Free sign up at http://www.powtoon.com/youtube/ -- Create animated videos and animated presentations for free ...
YouTube
· Jan 1, 2009
Video thumbnail for Behavioural Psychology and Conditioning - Simplest Explanation Ever
13:40
Icon for www.youtube.comyoutube.com › watch

Behavioural Psychology and Conditioning - Simplest Explanation Ever

Behavioural Psychology and Conditioning - Simplest Explanation Ever Behaviourism is one of the most important concepts in human and animal psychology. Behaviourists believe it's the most robust form of psychology as it relies on emperical evidence. We look at the work done by the major contributors and simplify the concept with Examples ...
YouTube
· Mar 21, 2021
Video thumbnail for Teoría de John B Watson
06:50
Icon for www.youtube.comyoutube.com › watch

Teoría de John B Watson

La teoría de John Watson, conocida como #conductismo se enfoca en el estudio de la conducta observable por encima de los procesos mentales internos como emociones o pensamientos. Watson argumentaba que la conducta de los individuos es el resultado de la interacción entre estímulos del ambiente y respuestas aprendidas a través de la ...
YouTube
· Feb 18, 2024
Video thumbnail for What is Behaviorism?
02:27
Icon for www.youtube.comyoutube.com › watch

What is Behaviorism?

This video lecture discusses very briefly the meaning of behaviorism. It specifically addresses the question "What is behaviorism?". The content of this video lecture is different from the content of the video lecture titled "Behaviorism in Education". Transcript of this video lecture is available at: https://philonotes.com/2022/11/what-is ...
YouTube
· Aug 31, 2021
Video thumbnail for Behavioural Perspective (Assumptions and Key Concepts) || ReadingisBest || Psychology Theory
02:11
Icon for www.youtube.comyoutube.com › watch

Behavioural Perspective (Assumptions and Key Concepts) || ReadingisBest || Psychology Theory

In this video I will talk about general ideas of behavioural perspective. Like, ABC Model of Behaviorism, John B. Watson, Operant Conditioning and Classical Conditioning. This video will answer the following questions: What is ABC model of behaviorism? Who is John B. Watson? What is operant conditioning? What is classical conditioning? What is ...
YouTube
· Jul 29, 2021
Video thumbnail for How to Train a Brain: Crash Course Psychology #11
11:49
Icon for www.youtube.comyoutube.com › watch

How to Train a Brain: Crash Course Psychology #11

I'm sure you've heard of Pavlov's Bell, but what was Ivan Pavlov up to, exactly? And how are our brains trained? And what is a "Skinner Box"? All those questions and more are answered in today's Crash Course Psychology, in which Hank talks about some of the aspects of learning. Want more videos about psychology? Check out our sister channel ...
YouTube
· Apr 21, 2014
Video thumbnail for Behaviorism In Psychology
04:12
Icon for www.simplypsychology.orgsimplypsychology.org › behaviorism

Behaviorism In Psychology

Behaviorism, also known as behavioral learning theory, is a theoretical perspective in psychology that emphasizes the role of learning and observable behaviors in understanding human and animal actions.
simplypsychology.org
· Aug 9, 2015
Video thumbnail for Skinner’s Theory of Behaviorism: Key Concepts
10:17
Icon for www.youtube.comyoutube.com › watch

Skinner’s Theory of Behaviorism: Key Concepts

This video lecture discusses B. F. Skinner's theory of behaviorism. Transcript of this video lecture is available at: https://philonotes.com/2023/03/b-f-skinners-theory-of-behaviorism *** For more Whiteboard editions from PHILO-notes, SUBSCRIBE NOW! https://www.youtube.com/c/PHILOnotes For more discussions about Philosophy, VISIT OUR WEBSITE ...
YouTube
· Feb 12, 2022
Video thumbnail for Behaviourist Approach | B.F. Skinner | Operant Conditioning | AQA Psychology
14:23
Icon for www.youtube.comyoutube.com › watch

Behaviourist Approach | B.F. Skinner | Operant Conditioning | AQA Psychology

📚 Study SMARTER, Stress LESS 👉 https://www.bearitinmind.org/join 🧠 for more PSYCHOLOGY RESOURCES SUBSCRIBE TO NEWSLETTER: https://www.bearitininmind.org This video explores what operant conditioning is as well as different types of reinforcement including positive reinforcement, negative reinforcement, positive punishment and negative ...
YouTube
· May 6, 2022
Video thumbnail for BF SKINNER | Radical Behaviorism | Conditioning | Theories of Personality | Taglish
15:36
Icon for www.youtube.comyoutube.com › watch

BF SKINNER | Radical Behaviorism | Conditioning | Theories of Personality | Taglish

Become a Member! https://www.youtube.com/channel/UCSOoGSp9LOcfn9Mk8ni_RTQ/join Full TOP Summary Playlist: https://youtube.com/playlist?list=PLp7eFNpHXcvDL-L6uO_YYTHHWAb1wORNh So ngayon naman, pumunta na tayo sa 3rd force in psychology which is ang cognitive-behavioral theories at pag-usapan natin ang Radical Behaviorism ni Burrhus Fredric ...
YouTube
· Jul 11, 2021
Video thumbnail for J.B Watson's theory of Personality | What is the Behavioural Psychology perspective?
03:04
Icon for www.youtube.comyoutube.com › watch

J.B Watson's theory of Personality | What is the Behavioural Psychology perspective?

In this video, we will discuss J.B Watson's theory of personality and behavioral psychology perspective in psychology. by j.b watson.,watson,behaviorism,john watson,behavioural theory of personality,behavioural,observable behavior,b.f skinner behaviorism theory,determinism,free will,albert bandura,albert bandura social cognitive theory,albert ...
YouTube
· Aug 20, 2022
Video thumbnail for John Watson Behaviorism- Learing Theory
07:07
Icon for www.youtube.comyoutube.com › watch

John Watson Behaviorism- Learing Theory

This video is about Behaviorism, which mainly focus on John Watson's version
YouTube
· Dec 25, 2017
Video thumbnail for John B. Watson || Behaviourism || Behavioural Perspective || ReadingisBest || Psychology Theory
02:28
Icon for www.youtube.comyoutube.com › watch

John B. Watson || Behaviourism || Behavioural Perspective || ReadingisBest || Psychology Theory

In this video, I will talk about Behavioural Perspective of John B. Watson. This video will answer the following questions: Who is John B Watson? Who developed behaviourism? What is Little Albert experiment? What is behaviourism of John B Watson? What should psychology study? Clarify the major ideas of John B. Watson. Explain the major ideas of ...
YouTube
· Aug 1, 2021
Video thumbnail for Word Association Theory | by John B. Watson | Explanation | Iqra Jabeen
15:24
Icon for www.youtube.comyoutube.com › watch

Word Association Theory | by John B. Watson | Explanation | Iqra Jabeen

In this video, I have explained the Word Association Theory by John B. Watson. His theory is very important in the fields of Linguistics, especially Psycholinguistics. Word Association Theory | by John B. Watson | Explanation | Iqra Jabeen Word Association Theory | by John B. Watson Word Association Theory? By J.B. Watson In Urdu and Hindi ...
YouTube
· Sep 1, 2023
Video thumbnail for (Lecture-1), Behaviorist Theory; Empiricism; Stimulus-response Theory; John B. Watson; Skinner
04:28
Icon for www.youtube.comyoutube.com › watch

(Lecture-1), Behaviorist Theory; Empiricism; Stimulus-response Theory; John B. Watson; Skinner

Behaviorist Theory; Empiricism; Stimulus-response Theory; John B. Watson; B. F. Skinner 00:00 Introduction 00:07 Topics to Talk about 00:44 Various Names of Behaviourist Theory 01:19 Coining of Behaviourism 01:47 Principal Originators 02:45 Birth of Behaviourist Theory 03:25 Dominance of Behaviourist Theory 03:37 Challenge to Behaviourist Theory
YouTube
· May 11, 2023
Video thumbnail for John B. Watson's Methodological Behaviorism EXPLAINED
04:24
Icon for www.youtube.comyoutube.com › watch

John B. Watson's Methodological Behaviorism EXPLAINED

Sign up and help me make more while gaining access to more like our member meetups: https://www.patreon.com/thedailyba John B. Watson’s “Methodological behaviorism” is “a philosophical position that views behavioral events that cannot be publicly observed as outside the realm of science.” Cooper, Heron & Heward (2007) New items in ...
YouTube
· Mar 10, 2021
Video thumbnail for The Legacy of John B Watson's Behaviorism
02:33
Icon for www.youtube.comyoutube.com › watch

The Legacy of John B Watson's Behaviorism

In the early 20th century, John B. Watson revolutionized psychology by shifting the focus from introspection to observable behavior. His controversial Little Albert experiment demonstrated that fear could be conditioned, laying the groundwork for behaviorism. Watson's work emphasized learned behaviors over innate responses, influencing modern ...
YouTube
· Sep 25, 2024
Video thumbnail for KVS Pedagogy | Theory of Behaviourism John Watson | DSSSB | EMRS 2025 by Ashish Sir
32:44
Icon for www.youtube.comyoutube.com › watch

KVS Pedagogy | Theory of Behaviourism John Watson | DSSSB | EMRS 2025 by Ashish Sir

KVS Pedagogy | Theory of Behaviourism John Watson | DSSSB | EMRS 2025 by Ashish Sir ------------------------------------------------------ 📌Explore Our Affordable Paid Courses:- 📕KVS PRT Batch 2025: https://physicswallah.onelink.me/ZAZB/4iq7p6d7 📕JEET KVS General Paper Batch 2025: https://physicswallah.onelink.me/ZAZB/e5t2fjbd ...
YouTube
· Mar 26, 2025
Video thumbnail for The Rise and Fall of John Watson – The theory of Behaviorism
04:18
Icon for www.youtube.comyoutube.com › watch

The Rise and Fall of John Watson – The theory of Behaviorism

The topics in my videos are: By the early 20th century, many psychologists had rejected introspection as a scientific method and advocated studying the mind through observable behavior in controlled experiments. John Watson emerged as the most prominent advocate of behaviorism, despite not being its originator. His 1913 lecture, Psychology as ...
YouTube
· Feb 12, 2025
Video thumbnail for Interesting Psychology! The Little Albert Experiment (live footage)
03:29
Icon for www.youtube.comyoutube.com › watch

Interesting Psychology! The Little Albert Experiment (live footage)

This educational video features John B. Watson, a behaviorist, and his controversial experiment known as "The Little Albert Experiment." Another link to the video: https://www.youtube.com/edit?o=U&video_id=l4ljOA8_jA4
YouTube
· May 22, 2016
Video thumbnail for The Mind-Blowing Impact of Behaviorism in Psychology
14:31
Icon for www.youtube.comyoutube.com › watch

The Mind-Blowing Impact of Behaviorism in Psychology

Let's take a quick look at the history of behaviorism and its impact on psychology. Behaviorism is a school of thought in psychology that is more than 100 years old but still highly relevant today. The main point of behaviorism is that the study of behavior should focus on external causes of behavior--particularly changes in the environment ...
YouTube
· Feb 1, 2023
Video thumbnail for What is the Little Albert Experiment ? CLASSICAL CONDITIONING
08:55
Icon for www.youtube.comyoutube.com › watch

What is the Little Albert Experiment ? CLASSICAL CONDITIONING

The little albert experiment. In this video, we will discuss the dark side of science, the little Albert experiment to measure the effect of classical conditioning on humans after Ivan Pavlov's dogs, which reached devastating results, and the owners of the experiment, John Watson and Rayner. If you want to know more about the study by John ...
YouTube
· Oct 18, 2022
Video thumbnail for Pavlov’s Classical Conditioning
05:34
Icon for www.youtube.comyoutube.com › watch

Pavlov’s Classical Conditioning

Classical conditioning is a mental manipulation to reprogram natural body functions. It is a way of learning where a stimulus that triggers a biological response is paired with a new stimulus that then results in the same reaction. Support us to make more videos for teachers: www.patreon.com/sprouts 💛 Download the video for FREE and without ...
YouTube
· May 30, 2020
Video thumbnail for John Watson's Behaviorism
05:51
Icon for www.youtube.comyoutube.com › watch

John Watson's Behaviorism

John B. Watson's Behaviorism By Khushdil Khan Kasi @sociologylearners1835 #psychology #behaviourism #watson Discover the revolutionary world of John B. Watson's Behaviorism, the paradigm shift that transformed psychology. Delve into the principles of Behaviorism, from the rejection of mentalism to the focus on observable behaviors. Explore the ...
YouTube
· Oct 14, 2023
Video thumbnail for Behaviorism: John B. Watson
03:37
Icon for www.youtube.comyoutube.com › watch

Behaviorism: John B. Watson

Dr. Bev Knox is a professor of psychology and author. In this lesson we will learn all about: Behaviorism Beginnings with John B. Watson. For over 25 years, Professor Knox has conducted research on human behavior and motivation, especially in the areas of positive psychology and personal development as demonstrated in her vast body of ...
YouTube
· Feb 5, 2019
Video thumbnail for Explaining Phobias | Behaviourism | Two-Process Model | AQA Psychology | A-level
10:10
Icon for www.youtube.comyoutube.com › watch

Explaining Phobias | Behaviourism | Two-Process Model | AQA Psychology | A-level

How do we explain phobias? Where do they come from? In this video we explore the Behaviourist explanation for Phobias, and specifically the Two-Process model. This video is part of the Psychopathology topic of the AQA A-level Psychology course. PSYCHOPATHOLOGY REVISION SUMMARY: https://www.bearitinmind.org/store/p/psychopathology-summary ...
YouTube
· Apr 17, 2021
Video thumbnail for Behaviorism - explained
00:52
Icon for www.youtube.comyoutube.com › watch

Behaviorism - explained

The primary principle of behaviorism, as expressed in the writings of John B. Watson and B. F. Skinner, and others, is that psychology should concern itself with the observable behavior of people and animals, not with unobservable events that take place in their minds. The behaviorist school of thought maintains that behaviors as such can be ...
YouTube
· May 30, 2013
Video thumbnail for John Watson: la BIOGRAFÍA del PADRE del CONDUCTISMO
05:06
Icon for www.youtube.comyoutube.com › watch

John Watson: la BIOGRAFÍA del PADRE del CONDUCTISMO

John Broadus Watson fue un psicólogo estadounidense, a quien se le atribuye la fundación de la escuela psicológica del conductismo a través de su disertación en la Universidad de Columbia titulada Psicología desde la mirada de un conductista. Para más información: https://goo.su/fUMMcVq
YouTube
· Oct 4, 2022
Video thumbnail for The Evolution of Behaviorism: How the Psychological Theory Has Changed Over Time
01:10:34
Icon for www.youtube.comyoutube.com › watch

The Evolution of Behaviorism: How the Psychological Theory Has Changed Over Time

This video explores the history of behaviorism, a psychological theory that explains the effects of stimuli on observable behavior. It traces the development of behaviorism throughout the years, beginning with the contributions of important thinkers in the field and ending with modern applications of the theory. The video also looks at how ...
YouTube
· Nov 21, 2020
Video thumbnail for John B. Watson & The Rise of Behaviorism"
06:41
Icon for www.youtube.comyoutube.com › watch

John B. Watson & The Rise of Behaviorism"

John B. Watson (1878–1958) was an American psychologist best known as the founder of behaviorism, a school of thought that emphasized the study of observable behavior over internal mental processes. He believed that human behavior is shaped primarily by environment and experience, not by innate traits or the unconscious mind.
YouTube
· 17 days ago
Video thumbnail for Theories of Personality Psychology Part 1 - Learn in 5 Minutes
05:06
Icon for www.youtube.comyoutube.com › watch

Theories of Personality Psychology Part 1 - Learn in 5 Minutes

Psychology in 5 Minutes These theories help us understand how personality forms and influences behavior. They seek to explain how personality forms, changes, and impacts behavior. Five key personality theories focus on biological, behavioral, psychodynamic, humanistic, and trait approaches. While these theories offer different explanations for ...
YouTube
· Dec 22, 2024
Video thumbnail for When A Newborn Baby Was Tormented For Science
09:36
Icon for www.youtube.comyoutube.com › watch

When A Newborn Baby Was Tormented For Science

In 1920, John B. Watson, a renowned psychologist, and Rosalie Rayner, his assistant and eventual wife, decided to combine love, science, and a fair bit of cluelessness in an experiment that would go down in history as “The Little Albert Experiment.” The idea was bold, the execution debatable, and the results as ethically murky as a ...
YouTube
· Jan 1, 2025
Video thumbnail for B. F. Skinner - Skinner on Behaviorism (1977)
30:07
Icon for www.youtube.comyoutube.com › watch

B. F. Skinner - Skinner on Behaviorism (1977)

B. F. Skinner discusses behavior modification, behavioral technology, and the uses of positive reinforcement in shaping human behavior.
YouTube
· Sep 20, 2016
Video thumbnail for Nursing Theorist Presentation: Jean Watson
05:27
Icon for www.youtube.comyoutube.com › watch

Nursing Theorist Presentation: Jean Watson

YouTube
· Jun 3, 2021
Video thumbnail for Teori Belajar Behaviorisme - Perilaku Stimulus - Respon - JOHN B WATSON
07:59
Icon for www.youtube.comyoutube.com › watch

Teori Belajar Behaviorisme - Perilaku Stimulus - Respon - JOHN B WATSON

Teori behaviorisme diperkenalkan oleh John B Watson sebenarnya merupakan kelanjutan dari teori pembiasaan klasik Pavlov dalam bentuk baru dan yang lebih terperinci serta didukung oleh eksperimen baru dengan binatang (terutama tikus) dan anak kecil (bayi).
YouTube
· Mar 27, 2021