___________________________________________________________________________________________________________________ Modified Camel and Cactus Test (mCCT) ___________________________________________________________________________________________________________________ Script Author: Katja Borchert, Ph.D. (katjab@millisecond.com) for Millisecond Software, LLC Date: 02-09-2023 last updated: 02-07-2024 by K. Borchert (katjab@millisecond.com) for Millisecond Software, LLC Script Copyright © 02-07-2024 Millisecond Software ___________________________________________________________________________________________________________________ BACKGROUND INFO ___________________________________________________________________________________________________________________ This script implements Millisecond Software's computerized version of the Modified Camel and Cactus Test (mCCT) developed by Moore et al (2022) on behalf of the Genetic FTD Initiative (GENFI) as a short alternative to the original Camel and Cactus Test (CCT) by Bozeat et al (2000). The mCCT is a test of semantic memory independent of language. *Reference* Moore, K et al (2022). A modified Camel and Cactus Test detects presymptomatic semantic impairment in genetic frontotemporal dementia within the GENFI cohort. APPLIED NEUROPSYCHOLOGY: ADULT 2022, VOL. 29, NO. 1, 112–119 https://doi.org/10.1080/23279095.2020.1716357 Note: complete paper and pencil test is published in the supplementay materials Bozeat, S., Lambon Ralph, M. A., Patterson, K., Garrard, P., & Hodges, J. R. (2000). Non-verbal semantic impairment in semantic dementia. Neuropsychologia, 38(9), 1207–1215. doi:10.1016/S0028-3932(00)00034-8 ___________________________________________________________________________________________________________________ TASK DESCRIPTION ___________________________________________________________________________________________________________________ Participants see 1 target item on top of the screen and 4 comparison items on the bottom. They are asked to find the comparison item that goes best with the target item. In this script, participants can correct their responses until they press button 'Next'. There are 3 practice trials and a total of 32 (fixed) test trials. ___________________________________________________________________________________________________________________ DURATION ___________________________________________________________________________________________________________________ the default set-up of the script takes appr. 5 minutes to complete ___________________________________________________________________________________________________________________ DATA FILE INFORMATION ___________________________________________________________________________________________________________________ The default data stored in the data files are: (1) Raw data file: 'mcct_raw*.iqdat' (a separate file for each participant) build: The specific Inquisit version used (the 'build') that was run computer.platform: the platform the script was run on (win/mac/ios/android) date, time: date and time script was run subject: with the current subject id group: with the current group id session: with the current session id blockcode, blocknum: the name and number of the current block (built-in Inquisit variable) trialcode, trialnum: the name and number of the currently recorded trial (built-in Inquisit variable) Note: trialnum is a built-in Inquisit variable; it counts all trials run; even those that do not store data to the data file. trialCounter: tracks the number of problems run itemnumber: the itemnumber of the currently presented problem response: the selected image/button of the current trial values.rsp: the number (1-4) of the currently selected image 1 = top, left; 2 = top, right 3 = bottom, left; 4 = bottom, right correctRsp: the image number of the current correct response correct: 1 = the selected response (rsp) is the same as the correctRsp 0 = otherwise Note: participants can change their selection until they press 'submit' countCorrect: the cumulative number of correct selections (established when participants press 'submit') latency: response latency (in ms) of the current trial; measured from: onset of trial rt_submit: the cumulative latency (in ms) until submit-button is pressed (2) Summary data file: 'mcct_summary*.iqdat' (a separate file for each participant) inquisit.version: Inquisit version run computer.platform: the platform the script was run on (win/mac/ios/android) startDate: date script was run startTime: time script was started subjectid: assigned subject id number groupid: assigned group id number sessionid: assigned session id number elapsedTime: time it took to run script (in ms); measured from onset to offset of script completed: 0 = script was not completed (prematurely aborted); 1 = script was completed (all conditions run) mCCT_score: final number of correctly selected items mCCT > 27 considered normal mCCT = 27 considered borderline mCCT < 27 considered abnormal (see Moore et al, 2022, p.115) meanCorrRT: mean submit response time (in ms) for correctly selected items ___________________________________________________________________________________________________________________ EXPERIMENTAL SET-UP ___________________________________________________________________________________________________________________ 1. Practice: 3 trials - 3 practice trials with feedback (by default feedback is presented for 5s) - items are presented in fixed order 2. Test: 32 trials - 33 test trials without feedback - items are presented in fixed order ___________________________________________________________________________________________________________________ STIMULI ___________________________________________________________________________________________________________________ All items were taken from the supplementary document of Moore et al (2022). Separate image files were prepared for each target and comparison items and stored as 800x800px images. ___________________________________________________________________________________________________________________ INSTRUCTIONS ___________________________________________________________________________________________________________________ provided by Millisecond Software - can be edited under section 'Editable Instructions'. Instructions were based on instructions in the paper and pencil version but adapted by Millisecond Software for computer use. ___________________________________________________________________________________________________________________ EDITABLE CODE ___________________________________________________________________________________________________________________ check below for (relatively) easily editable parameters, stimuli, instructions etc. Keep in mind that you can use this script as a template and therefore always "mess" with the entire code to further customize your experiment. The parameters you can change are: