Sport Psychology Basics: focus, nerves and routines (education only)

01

What sport psychology is, and how to read the evidence

In simple words

Your body plays the game, but your mind decides where to look, how you feel and what you tell yourself. Sport psychology teaches simple mind skills, like practising a free throw. They can help, but they are not magic, and they do not replace a doctor.

Before this course: none. It helps to have played a sport such as tennis or pickleball (courses 10.1 and 10.2). This course is for players, parents and beginner coaches.

Key facts

Sport psychology studies how thoughts, feelings and behaviour affect sport, and how sport affects people. Mental skills training teaches skills such as routines, self-talk and imagery.
Effect size tells you how big a difference a study found. One common measure is Cohen's d (or the similar Hedges' g): the difference between two group averages, divided by the spread of the scores.
Common rules of thumb: about 0.2 small, 0.5 medium, 0.8 large. These are rough conventions, not laws, and other fields use other scales.
Example (made-up, checked in Python): group A averages 7.2 out of 10 on a serve accuracy test, group B averages 6.4, and the spread of scores is 2.0. d = (7.2 - 6.4) / 2.0 = 0.4, a small to medium effect.
A meta-analysis combines many studies to get one overall number. It is more reliable than one study, but it can still be shaky if the studies are small, short, done in labs, or if studies with no result were never published.
Honest rule: mental skills often show small to moderate effects on performance, on average. Individuals vary a lot. Practice and physical training still come first.
Plain language to use: "may help" and "on average", not "will" or "guaranteed".

Effect size (d)	Rough label	Plain meaning
About 0.2	Small	You would notice it only by measuring
About 0.5	Medium	Visible, but not huge
About 0.8	Large	Big and obvious

Step by step

Pick one mental skill you want to learn about (for example, a routine before serving).
Write what you hope will change (for example, feel calmer on second serves).
Write how you will measure it (for example, a 1 to 10 calm score and first serve percentage).
Remind yourself: the skill may help a little to a medium amount, and results vary.
Check: you wrote one skill, one thing to measure, and one honest sentence about expected results.

Watch on YouTube

Mind of the Athlete: managing performance anxietyMindOfTheAthlete · YouTube · youtube.com

Videos by other creators on YouTube, for reference. They are not made by or affiliated with The Future Market.

LESSON 01What sport psychology is, and how to read the evidence

LESSON 01 / ANIMATED LESSON / AI VOICE00:00 / 01:00

Voice

Read the video script

[Host] "Sport psychology is training the mind the same way you train the body."
[Text on screen: Effect size] "An effect size says how big a difference is. About 0.2 is small, 0.5 is medium, 0.8 is large."
[Text on screen: Honest results] "For mental skills, studies usually find small to moderate effects, and people vary a lot."
[Text on screen: Not a doctor] "These skills do not treat anxiety or depression. For that, see a licensed professional."
[Host] "Useful, honest and not magic."

Try it now

Write one mental skill, how you will measure it and one honest sentence about what to expect. Keep it for lesson 7.

ClaudeStuck? Copy a ready-made prompt for Claude

Copy this, open Claude, paste it, and Claude will walk you through the lesson step by step.

For a grown-up: Claude is for adults (18+). Copy this, paste it into Claude, and use the answer to explain the lesson to your child.

I'm learning "Sport Psychology Basics: focus, nerves and routines (education only)" on The Future Market. Lesson 1: "What sport psychology is, and how to read the evidence".

What the lesson teaches:
- Sport psychology studies how thoughts, feelings and behaviour affect sport, and how sport affects people. Mental skills training teaches skills such as routines, self-talk and imagery.
- Effect size tells you how big a difference a study found. One common measure is Cohen's d (or the similar Hedges' g): the difference between two group averages, divided by the spread of the scores.
- Common rules of thumb: about 0.2 small, 0.5 medium, 0.8 large. These are rough conventions, not laws, and other fields use other scales.
- Example (made-up, checked in Python): group A averages 7.2 out of 10 on a serve accuracy test, group B averages 6.4, and the spread of scores is 2.0. d = (7.2 - 6.4) / 2.0 = 0.4, a small to medium effect.
- A meta-analysis combines many studies to get one overall number. It is more reliable than one study, but it can still be shaky if the studies are small, short, done in labs, or if studies with no result were never published.
- Honest rule: mental skills often show small to moderate effects on performance, on average. Individuals vary a lot. Practice and physical training still come first.
- Plain language to use: "may help" and "on average", not "will" or "guaranteed".

The exercise I'm working on:
Write one mental skill, how you will measure it and one honest sentence about what to expect. Keep it for lesson 7.

I'm stuck. Please:
1. Explain the main idea in plain, simple words with one everyday example.
2. Walk me through the exercise one small step at a time. Ask me what I've done so far before giving the next step.
3. Don't just give me the final answer. Help me do it myself, and check my work when I share it.
4. This is for learning only. Remind me to check with a licensed professional before I make a real decision about my own money, health or legal situation.

I'm a parent helping my child (about 8 years old) with a lesson called "What sport psychology is, and how to read the evidence" from the course "Sport Psychology Basics: focus, nerves and routines (education only)".

Here's what the lesson says:
Your body plays the game, but your mind decides where to look, how you feel and what you tell yourself. Sport psychology teaches simple mind skills, like practising a free throw. They can help, but they are not magic, and they do not replace a doctor. Before this course: none. It helps to have played a sport such as tennis or pickleball (courses 10.1 and 10.2). This course is for players, parents and beginner coaches.

The activity:
Write one mental skill, how you will measure it and one honest sentence about what to expect. Keep it for lesson 7.

Please explain this so an 8-year-old understands: short sentences, a fun everyday example, and no hard words.
Then give me 3 simple questions I can ask my child to check they understood, and a way to do the activity together, one tiny step at a time.
Keep it general and educational. This is not advice for a real situation.

Open Claude

Sources

Rules of thumb for Cohen's d (0.2, 0.5, 0.8) are conventions, and other fields use other scales; see the R effectsize package documentation: easystats.github.io/effectsize/reference/interpret_cohens_d.html
Example numbers calculated in Python.

My notes

I learned this

02