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Module 6 · Lesson 3 · Core

The study environment and distraction

Count what interruptions cost and design a setting that protects your attention.

  • 50 minutes
  • Serves O2
  • Assumes M6.L2

Phase 1: Prepare

Step 1 Warm-up recall

From M6.L2: where does a break fall in a block plan?

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Step 2 Learning goal

By the end of this lesson you can:

  • count the cost of interruptions (Foundation);
  • design a low-distraction setting (Core);
  • say what the evidence cannot tell you (Core).

Phase 2: Teach

Step 3 A familiar example

Each time a notification pulls you away, you lose the seconds you spend on it plus the time to find your place again.

Step 4 Clear explanation

Working memory holds only a few items (Module 2). An interruption empties some of them, so you must rebuild your place. Rubinstein, Meyer and Evans (2001) showed that switching between tasks costs time and accuracy.

Workingdeep in the taskInterruptedphone or messageGetting backtime lost
Every interruption has a cost: the time of the interruption plus the time to get back into the task.
Item (invented 90-minute session)Minutes
Session length90
Interruptions: 12 x 2 minutes each24
Focused time left (90 − 24)66

In the invented session, 12 interruptions of 2 minutes each cost 24 minutes, leaving 90 − 24 = 66 minutes of focused work. The real cost differs, since getting back often takes longer than the interruption itself. Practical changes include putting the phone in another room or on silent, closing unneeded tabs, keeping one task visible and agreeing on quiet times with the people around you.

The setting also matters for recall: studying in the place you will be tested may help a little, but varying places can help too, so do not build a rule on it. It helps to have a regular place so that sitting down becomes a cue to work. Avoid assuming that background music helps or harms everyone; the evidence is mixed and depends on the task and on the person. Test your own set-up (Module 8). See the entry on working memory for why switching costs so much.

Step 5 Worked example (4 marks)

A 60-minute session has 9 interruptions costing 3 minutes each. How much focused time is left?

  1. Lost time: 9 x 3 = 27 minutes. (1 mark)
  2. Focused time: 60 − 27. (1 mark)
  3. = 33 minutes. (1 mark)
  4. Answer: 33 minutes. (1 mark)

Phase 3: Practise

Step 6 Learner practice (instant-marked)

1. Task switching usually:

2. 12 interruptions at 2 minutes each cost:

3. The best simple fix for phone distraction is to:

4. About background music, the evidence is:

Phase 4: Close

Step 7 Recap

  • Interruptions cost the time spent and the time to return.
  • Remove cues and agree quiet times.
  • Test your own set-up rather than trust a rule.

Step 8 Exit ticket (ungraded)

8 interruptions at 2 minutes in a 50-minute session: focused time left?

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Step 9 Go further (Extension)

Count your own interruptions in one 30-minute session.

Common mistakes

MistakeWhy it fails
Keeping the phone beside youMove it away.
Counting only the interruption itselfAdd time to return.
Trusting a one-size rule for musicTest yourself.

Limits. The numbers are invented; research on environments and music is mixed, so use your own trial.