Encoding and Retrieval Efficiency of Episodic Data in a Modified Sparse Distributed Memory System
نویسندگان
چکیده
This paper presents detailed simulation results on a modified Sparse Distributed Memory (SDM) system. We have modified Kanerva’s original SDM system into an architecture with a ternary memory space. This enables the memory to be used as a Transient Episodic Memory (TEM) in cognitive software agents. TEM is a memory with high specificity and low retention, used for events having features of a particular time and place. Our earlier work focused on perfunctory, proof of concept assessments on the modified SDM system. This paper presents a detailed experimental evaluation of the modified SDM system with regard to its ability to store and retrieve episodic information.
منابع مشابه
Realizing Forgetting in a Modified Sparse Distributed Memory System
This paper presents research on the development of effective forgetting mechanisms for the Sparse Distributed Memory (SDM) system, to computationally model Transient Episodic Memory (TEM), a short-term sensory perceptual episodic memory in software agents. Possible theories and mechanisms for forgetting are retrieval failures, decay and interference. The SDM architecture has inherent features t...
متن کاملCognitive Self-Awareness and Episodic Memory in Patients with Obsessive Compulsive Disorder and Healthy Individuals
Background & Aims: Recent studies have indicated memory dysfunction in individuals with obsessive compulsive disorder (OCD). The present study aimed to examine the relationship between cognitive selfawareness and episodic memory performance in patients with OCD and healthy individuals. Methods: In the present study, 30 patients with OCD and 30 normal individuals in the Shiraz Professional C...
متن کاملNeural correlates of age-related verbal episodic memory decline: a PET study with combined subtraction/correlation analysis.
Using PET, we have determined the neural substrates of age-related verbal episodic memory decline. Twelve young and twelve older healthy volunteers (mean age; 22 and 59 years, respectively) were scanned while performing encoding and retrieval tasks. Retrieval performance was lower in old than in young subjects. The PET data were analyzed using a combined subtraction/correlation approach. Classi...
متن کاملAsymmetric frontal activation during episodic memory: the effects of stimulus type on encoding and retrieval.
Recent functional neuroimaging studies have suggested that the left prefrontal cortex is preferentially involved in the encoding of episodic memory whilst the right prefrontal cortex is preferentially involved in the retrieval of episodic memory, irrespective of the type (e.g. modality) of information being remembered. In the present PET activation study, a 2 x 2 design was employed to investig...
متن کاملMemory encoding and retrieval in the aging brain.
Decline in episodic memory, the encoding and retrieval of autobiographical events, is a hallmark of normal cognitive aging. Although the primary causes of this decline remain elusive, event-related brain potential (ERP) studies have contributed to an understanding of age-related episodic memory failure. These data reveal that, although the retrieval-based episodic memory (EM) effect does not di...
متن کامل