Which of the following is true about working memory capacity?

Working memory capacity refers to the ability to hold and manipulate information over short periods. Research suggests that this capacity is not fixed and can be enhanced through specific training regimens. Such training typically involves activities that challenge and engage the working memory. For instance, strategies like mnemonic devices, cognitive exercises, or certain types of problem-solving tasks can lead to improvements in working memory performance. This ability to increase working memory capacity through practice underscores the brain's plasticity and adaptability throughout the lifespan.

Other options may misrepresent the characteristics of working memory. For instance, while working memory capacity does not remain constant and is subject to improvement, it does not tend to be larger in children than in adults, as adults typically have more developed cognitive strategies to utilize their working memory effectively. Additionally, although there can be a decline in working memory capacity associated with aging, this is not universally true; many older adults maintain effective working memory with continued cognitive engagement.