Cognition

This measure examines episodic memory. A series of images is presented in a specific order on the screen. Following this presentation, the images are scrambled, and the respondent is asked to recall the original order and place the images accordingly. 

This measure targets inhibitory control and attention. It requires respondents to indicate the left-right orientation of a centrally presented stimulus (arrow) while inhibiting attention to potentially incongruent stimuli(other arrows) that surround it. 

This is a two-part test that targets associative memory function.  Respondents are first presented with an encoding task and then prompted to recall a series of face-name associations after a 5- to 20-minute delay.   

This measure assesses processing speed by asking respondents to match numbers with specific symbols using a digit/symbol key.  Respondents have 90 seconds to correctly match as many number-symbol pairs as they can.  

This is a measure of working memory that requires a participant to remember a string of letters and numbers and manipulate them to put them in alphabetical and numeric order using a custom keypad on their phone screen.  

This measure targets cognitive flexibility. Simple images are presented that vary along two dimensions (color and shape) and respondents are then given a prompt and asked to choose an image based on which one of the dimensions was prompted. 

This task assesses the ability to spell words administered in a computer-adaptive test format. Respondents listen to audio that presents the word and its use in a sentence and then, using their phone keyboard, spell the word. Maximum number of words presented is 30. 

This is a computer-adaptive test that measures general vocabulary knowledge. Respondents select the word or phrase from among five choices that most closely matches the meaning of a target word. Maximum number of words presented is 25.