Script Author: Katja Borchert, Ph.D. (katjab@millisecond.com), Millisecond
Credits:
this script is based on An Raes' original inattentionalblindness.iqjs script that collects
the input on paper and pencil
the input on paper and pencil
Last Modified: January 04, 2025 by K. Borchert (katjab@millisecond.com), Millisecond
Script Copyright © Millisecond Software, LLC
This script runs an Inattentional Blindness Task adapted from Most et al (2005). Inattentional blindness is the phenomenon that people fail to notice unexpected events because their attention is focused on something else.
Most, S. B., Scholl, B. J., Clifford, E. R., & Simons, D. J. (2005). What you see is what you set: sustained inattentional blindness and the capture of awareness. Psychological review, 112(1), 217–242. https://doi.org/10.1037/0033-295X.112.1.217
5 minutes
Participants view several animated displays that depict members of 4 shapes in white and black floating around in a field (here: squares and circles). The task is to count how often a certain kind of shape bumps into the walls. At some point during the experiment, a target stimuli (here: a red X) moves through the space.
2 trials that present animated displays without target
2 trials that present animated displays with a target (here: red X) without target alert
-> however, instructions at the end ask whether something unusual was noticed
1 trial that presents video with a target with explicit target alert
The animated displays are randomly created by the script.
see section Editable Instructions
File Name: dynamicinattentionalblindness_summary*.iqdat
| Name | Description |
|---|---|
| inquisit.version | Inquisit version number |
| computer.platform | Device platform: win | mac |ios | android |
| computer.touch | 0 = device has no touchscreen capabilities; 1 = device has touchscreen capabilities |
| computer.hasKeyboard | 0 = no external keyboard detected; 1 = external keyboard detected |
| startDate | Date the session was run |
| startTime | Time the session was run |
| subjectId | Participant ID |
| groupId | Group number |
| sessionId | Session number |
| elapsedTime | Session duration in ms |
| completed | 0 = Test was not completed 1 = Test was completed |
| noticeCritical | 1 =participant noticed something during critical trial 0 = otherwise |
| responseCritical | Contains the detailed description of the stimulus noticed during the critical trial |
File Name: dynamicinattentionalblindness_raw*.iqdat
| Name | Description |
|---|---|
| build | Inquisit version number |
| computer.platform | Device platform: win | mac |ios | android |
| computer.touch | 0 = device has no touchscreen capabilities; 1 = device has touchscreen capabilities |
| computer.hasKeyboard | 0 = no external keyboard detected; 1 = external keyboard detected |
| date | Date the session was run |
| time | Time the session was run |
| subject | Participant ID |
| group | Group number |
| session | Session number |
| blockcode | The name the current block (built-in Inquisit variable) |
| blocknum | The number of the current block (built-in Inquisit variable) |
| trialcode | The name of the currently recorded trial (built-in Inquisit variable) |
| trialnum | The number of the currently recorded trial (built-in Inquisit variable) trialnum is a built-in Inquisit variable; it counts all trials run even those that do not store data to the data file. |
| focusDistractor | The type of figure randomly selected to pay attention to (1-4) |
| stimulusItem | The presented stimuli in order of trial presentation |
| response | The participant's response (scancode of response buttons) |
| latency | The response latency (in ms) |
| fig1BorderCount-fig4BorderCount | The computer counted bounces |
| noticeCritical | 1 =participant noticed something during critical trial 0 = otherwise |
| responseCritical | Contains the detailed description of the stimulus noticed during the critical trial |
The procedure can be adjusted by setting the following parameters.
| Name | Description | Default |
|---|---|---|
Ui |
||
| showCenterLine | True = a center line is presented in the middle of the display false = no center line is presented in the middle of the display | false |
Sizing Parameters |
||
| targetCenterDistanceInPercent: | The %distance that the target travels above (negative values) or below (positive values) from the center of the display | 0% |
Timing Parameters |
||
| movieDuration | The duration (in ms) that the dynamic 'movies' should play | 15000 |
| targetDelay | The delay (in ms) of the target after onset of 'movie' | 7000 |
| targetSpeed | The approximate speed (in ms) of the target through the visible space | 5000 |
| distractorSpeed | The time (in ms) that each distractor figure takes to travel from one spot to the next | 100 |