Do different working memory tasks measure the same thing?

What is the main psychometric objective of this study regarding working memory tasks?

The study aims to investigate whether complex span and n-back tasks measure the same underlying working memory construct by using a hierarchical latent-factor model to control for task- and paradigm-specific variance.

Source: A task is a task is a task: putting complex span, n-back, and other working memory indicators in psychometric context · DOI · quote verified

What average correlation did prior meta-analytic research find between complex span and n-back tasks?

Prior meta-analyses found an average correlation of r = 0.20, leading researchers to conclude that the tasks cannot be used interchangeably.

Source: A task is a task is a task: putting complex span, n-back, and other working memory indicators in psychometric context · DOI

According to the authors, what four sources of variance contribute to performance on any single cognitive test?

Performance on a test is composed of construct variance, measurement error, task-specific variance, and paradigm-specific variance.

Source: A task is a task is a task: putting complex span, n-back, and other working memory indicators in psychometric context · DOI · quote verified

Once measurement error and task/paradigm-specific variances were controlled, what was the latent correlation between the complex span and n-back factors?

The latent factors of complex span and n-back correlated substantially at r = 0.69 in both younger and older adults.

Source: A task is a task is a task: putting complex span, n-back, and other working memory indicators in psychometric context · DOI · quote verified

What are the three levels of the hierarchical model proposed by the authors to structure working memory assessment?

The model includes a general working memory factor at the top (construct level), operationalized by different paradigms (paradigm level), which are measured by tasks with varying contents (content level).

Source: A task is a task is a task: putting complex span, n-back, and other working memory indicators in psychometric context · DOI · quote verified

Who were the participants in this study?

The sample consisted of 101 younger adults (aged 20–31) and 103 older adults (aged 65–80) screened for cognitive deficits.

Source: A task is a task is a task: putting complex span, n-back, and other working memory indicators in psychometric context · DOI · quote verified

How did the raw correlations among working memory tasks compare between younger and older adults?

Raw correlations varied widely, ranging from 0.09 to 0.75 for younger adults and 0.14 to 0.67 for older adults, with the highest correlations between tasks of the same paradigm.

Source: A task is a task is a task: putting complex span, n-back, and other working memory indicators in psychometric context · DOI · quote verified

Which pair of tasks showed the lowest raw correlations in the samples?

Reading span showed the lowest correlations with n-back tasks (in younger adults) and with sorting span tasks (in older adults).

Source: A task is a task is a task: putting complex span, n-back, and other working memory indicators in psychometric context · DOI · quote verified

Why could the low correlation between reading span and other tasks not be explained by low reliability?

Even when correcting for unreliability (assuming perfect reliability), the correlation between reading span and numerical 3-back remained extremely low (r = 0.11).

Source: A task is a task is a task: putting complex span, n-back, and other working memory indicators in psychometric context · DOI

What did the multi-group structural equation modeling show regarding the measurement invariance of the paradigm factors?

The study demonstrated metric invariance across younger and older adults, meaning the task loadings on their respective paradigm factors were equivalent across both age groups.

Source: A task is a task is a task: putting complex span, n-back, and other working memory indicators in psychometric context · DOI

How did the definitions of the working memory factor differ among paradigms for younger adults?

In younger adults, the general working memory factor was more strongly defined by complex span and memory updating than by n-back and sorting span.

Source: A task is a task is a task: putting complex span, n-back, and other working memory indicators in psychometric context · DOI · quote verified

Unlike younger adults, what was the pattern of paradigm loadings on the general working memory factor in older adults?

For older adults, the standardized loadings did not differ significantly, indicating that working memory was measured equally well by all four paradigms.

Source: A task is a task is a task: putting complex span, n-back, and other working memory indicators in psychometric context · DOI · quote verified

How much variance in the reasoning factor was predicted by the general working memory factor in younger and older adults?

The working memory factor predicted 71% of reasoning variance in younger adults and 83% in older adults.

Source: A task is a task is a task: putting complex span, n-back, and other working memory indicators in psychometric context · DOI · quote verified

How did individual paradigm factors perform compared to the general higher-order working memory factor in predicting reasoning?

No single paradigm alone could explain as much variance in reasoning as the higher-order general working memory factor that combined all paradigms.

Source: A task is a task is a task: putting complex span, n-back, and other working memory indicators in psychometric context · DOI · quote verified

Why did sorting span emerge as the strongest unique paradigm predictor of reasoning?

Sorting span requires high complexity in both storage capacity and relational updating, as bindings of multiple elements to rank positions must be continuously updated.

Source: A task is a task is a task: putting complex span, n-back, and other working memory indicators in psychometric context · DOI · quote verified

In the permutation analysis, how did the average correlation between three selected tasks relate to their ability to predict reasoning?

There was a negative correlation, meaning that more heterogeneous indicators (which correlate less with each other) provided better latent construct coverage and predicted reasoning better.

Source: A task is a task is a task: putting complex span, n-back, and other working memory indicators in psychometric context · DOI · quote verified

What psychometric paradox does the study illustrate regarding task selection for measuring a broad latent construct?

Selecting highly intercorrelated (homogeneous) tasks covers a smaller sub-space of the construct, whereas selecting heterogeneous tasks with lower intercorrelations provides better overall construct representation.

Source: A task is a task is a task: putting complex span, n-back, and other working memory indicators in psychometric context · DOI · quote verified

What practical task-selection advice do the authors offer for assessing individual differences in working memory?

Instead of using a single task, researchers should use a heterogeneous battery of tasks and average their performance to minimize paradigm- and content-specific biases.

Source: A task is a task is a task: putting complex span, n-back, and other working memory indicators in psychometric context · DOI · quote verified

What scientific danger do the authors warn against when researchers focus exclusively on a single working memory paradigm?

Researchers risk developing highly refined models that explain task-specific, idiosyncratic processes rather than the core theoretical construct of interest.

Source: A task is a task is a task: putting complex span, n-back, and other working memory indicators in psychometric context · DOI · quote verified

How did the reading span task used in this study differ from traditional versions?

Instead of memorizing words, participants had to decide if sentences were semantically correct while memorizing a sequence of single letters for serial recall.

Source: A task is a task is a task: putting complex span, n-back, and other working memory indicators in psychometric context · DOI · quote verified

What did participants have to do in the counting span task?

Participants had to count blue circles on displays containing various shapes, decide if the count was odd/even, and memorize the numbers of circles for serial recall.

Source: A task is a task is a task: putting complex span, n-back, and other working memory indicators in psychometric context · DOI · quote verified

What dual-task demands were combined in the rotation span task?

It combined a letter-rotation symmetry decision (regular vs. mirror-reversed) with memorization and serial recall of the direction and length of sequences of arrows.

Source: A task is a task is a task: putting complex span, n-back, and other working memory indicators in psychometric context · DOI · quote verified

What kind of lure items were included in the 3-back spatial task to increase difficulty?

The task included 4-, 5-, and 6-back lures (items appearing in positions occupied 4, 5, or 6 steps earlier) to prevent simple familiarity-based responding.

Source: A task is a task is a task: putting complex span, n-back, and other working memory indicators in psychometric context · DOI · quote verified

Describe the operations required in the numerical memory updating task.

Participants memorized four digits in a horizontal row, sequentially applied mathematical additions/subtractions shown in a second row, and entered the final updated values.

Source: A task is a task is a task: putting complex span, n-back, and other working memory indicators in psychometric context · DOI · quote verified

How was spatial memory updating assessed?

Participants memorized the positions of black dots in four 3x3 grids and updated their locations mentally following sequential shifting operations shown as arrows.

Source: A task is a task is a task: putting complex span, n-back, and other working memory indicators in psychometric context · DOI · quote verified

How does the Alpha span task assess sorting and updating?

As consonants are sequentially presented, participants must decide if an accompanied number matches the current alphabetical rank of that letter among all accumulated letters.

Source: A task is a task is a task: putting complex span, n-back, and other working memory indicators in psychometric context · DOI · quote verified

What are the stimuli and sorting criteria used in the Animal span task?

Six animal names are sequentially presented, and participants must continuously order them by their physical size and verify their current rank order.

Source: A task is a task is a task: putting complex span, n-back, and other working memory indicators in psychometric context · DOI · quote verified

How was the latent reasoning factor operationalized in this study?

It was measured using nine reasoning items from the Berlin Intelligence Structure (BIS) test, aggregated into three parcels combining verbal, numerical, and figural content.

Source: A task is a task is a task: putting complex span, n-back, and other working memory indicators in psychometric context · DOI · quote verified

From what larger longitudinal study were the datasets for this investigation drawn?

The datasets were obtained from the pretest phase of the COGITO Study, which included extensive cognitive testing sessions.

Source: A task is a task is a task: putting complex span, n-back, and other working memory indicators in psychometric context · DOI · quote verified