Table 2.

Mean Estimates of Capacity and Chunk Size

Scoring Method	Age / Attention Group
Chunking Assumption	Younger / Full	Older / Full	Younger / Divided
Capacity Estimate (Ki)
Strict
No New Chunks1	4.10	2.47	2.40
New Chunks2	2.45	1.62	1.60
Free
No New Chunks1	4.92	3.39	3.38
New Chunks2	3.08	2.33	2.35
Chunk Size (Si)
Strict
No New Chunks13	1.12	1.16	1.26
New Chunks23	1.82	1.70	1.75
Free
No New Chunks13	1.13	1.18	1.25
New Chunks23	1.77	1.66	1.71

Note. These estimates are averaged across the 0-, 1-, 2-, and 4-pairing conditions. Strict-scoring estimates are based on data with several missing cells filled as in the analysis of pair completion scores.

¹According to Equation (1) in text

²According to Equation (2) in text

³According to Equation (3) in text