Week 9 laboratory · last weekly report

A game that studies a question

Question: are people worse at withholding a frequent response than at executing it? Amber circle = press space. Mint square = do nothing. Write a predicted false-alarm rate before you start. Export the CSV into data/.

This block

Usable trials only

Go times under 150 ms are anticipations. Times over 1000 ms, or a missed go, are lapses. Every trial is stored. Means use correct go responses in 150–1000 ms. No-go accuracy is the share of holds you actually withheld.

go mean RT Milliseconds, correct go trials in 150–1000 ms.

—

n = 0 · no-go accuracy = —

Condition	n	Result
No trials yet.

Click the display, then start a block. 0 / 0

About one trial in five is a hold. Practice means are not findings.

The instrument

Question first, then the game

Tonight’s n is still small. That is not the week’s lesson. The tool is a browser game that can study a question: it presents two conditions, records a response and a time, and writes a CSV you can reopen in Week 5 or in the final project.

A game without a logged comparison is a toy. This page withholds on a mint square so you can count false alarms against go misses.

Remix

Arts and Science

Arts: change the feel. This build uses a proceed / hold signal (amber circle vs mint square) instead of Week 2’s gold and blue squares. Recolour the mark, rename the conditions, or rewrite the hold copy. Do not add a library.

Science: log one extra variable. This build stores soa_ms — the wait from fixation to stimulus. You could instead flag catch trials or collect a confidence key after each trial.

Class night

Agenda

18:00 Introduction: A game is an instrument if it records a comparison you stated first.
18:25 Demonstration: Play eight practice trials. Write a predicted false-alarm rate.
18:40 Exercise: Run the scored block. Export the CSV into data/.

19:25 Results: One sentence: go mean, no-go accuracy, n, and what you will not claim.
20:05 Modification: Arts: feel and theme of the mark. Science: one extra logged column.
Reading: This page. Optional extra on n: sample.html.

Report: path to the exported CSV, the question you studied, and one limit. Last weekly report. Due Tuesday 10 November.