编码和检索阶段的异质情境流畅性对再认的影响

研究采用经典的R/K范式，通过两个实验分别探讨编码阶段和检索阶段的异质情境流畅性对再认的影响。实验1为2（异质情境：高流畅性预期情境和低流畅性预期情境）×2（测试词类型：目标词和分心词）的混合实验设计，异质情境发生在编码阶段；实验2与实验1设计相同，不同之处在于异质情境发生在检索阶段。结果发现：异质情境发生在检索阶段时只对K反应产生影响，目标词在高流畅性情境中比低流畅性情境中的K反应率更高，而分心词在低流畅性情境中比高流畅性情境中的K反应率更高。研究表明，检索阶段的异质情境流畅性只影响熟悉性再认，支持双系统加工理论。     

Searching in the sand: Protracted video deficit in U.S. preschoolers' spatial recall using a continuous search space

Young children exhibit a video deficit for spatial recall, learning less from on-screen than in-person demonstrations. Some theoretical accounts emphasize memory constraints (e.g., insufficient retrieval cues, competition between memory representations). Such accounts imply memory representations are graded, yet video deficit studies measuring spatial recall operationalize memory retrieval as dichotomous (success or failure). The current study tested a graded-representation account using a spatial recall task with a continuous search space (i.e., sandbox) rather than discrete locations. With this more sensitive task, a protracted video deficit for spatial recall was found in children 4–5 years old (n = 51). This may be due to weaker memory representations in the screen condition, evidenced by higher variability and greater perseverative bias. In general, perseverative bias decreased with repeated trials. The discussion considers how the results support a graded-representation account, potentially explaining why children might exhibit a video deficit in some tasks but not others.

Research Highlights

• The task used a continuous search space (sandbox), making it more difficult and sensitive than spatial recall tasks used in prior video deficit research.
• Spatial recall among 4- and 5-year-old children was more variable after watching hiding events on screen via live video feed than through a window.
• Children's spatial recall from screens was more susceptible to proactive interference, evidenced by more perseverative bias in an A-not-B design.
• The results demonstrate memory representations blend experiences that accumulate over time and explain why the video deficit may be protracted for more difficult tasks.