## Overview ##
The repository contains data from a project **investigating the specificity of context and target memory functioning in developmental dyslexia**. The study was conducted in the framework of **dual recollection theory** (cf. Brainerd et al., 2015; Nieznański, 2020).
In the original study, data were analyzed with the use of **standard statistical methods and multinomial modeling** (e.g., Erdfelder et al., 2009). Results show **significant differences in memory functioning** between dyslexic and typically developing young adults **in both verbal and pictorial memory**: for a detailed analysis see Obidziński and Nieznański (in review).
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## Dataset ##
Dataset consists of variables indicating (names of variables in the file given in square brackets):
- diagnosis of dyslexia or typical development **[Dyslexia]**
- participant number **[NR]**
- data from the memory experiment presented both as the probability and number of "yes" and "no" answers for different experimental conditions; each variable is described by 4-part abbreviation **[e.g. w_p_pq_p]**:
- 1: **[w]** & **[i]** indicates either verbal or pictorial material (**w**ord or **i**mage)
- 2: indicates the type of stimuli in the test phase:
- **[n]** indicates distractor (**n**ew item)
- **[p]** and **[v]** indcates target item presented in study phase with question about perceptual (**p**honological/**v**isual) similarity
- **[s]** indicates the target item presented in the study phase with the question about **s**emantic similarity
- 3: indicates the type of test phase probe presented with given stimuli:
- **[bq]** indicates questions about any context in the study phase
- **[pq]** & **[vq]** indicates question about perceptual similarity in study phase
- **[sq]** indicates questions about the semantic similarity in the study phase
- 4: indicates type of data:
- **p**robability of "yes" answer **[p]**
- number of "**y**es" answers **[y]**
- number of "**n**o" answers **[n]**
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## Multinomial Processing Tree Model files ##
File called *'DRT model_ DD and TD_ visual and pictorial'* contains a multinomial model used in data analysis along with data for both verbal and pictorial memory.
Data set 1 - pictorial memory
Data set 2 - verbal memory
Parameters:
- *CB* = *CP*
- *CZ* = *CS*
- *FB* = *FP*
- *FZ* = *FS*
- *TB* = *TP*
- *TZ* = *TS*
- *d* in the parameter name = Dyslexia group
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## Reference ##
- Brainerd, C. J., Gomes, C. F. A., & Nakamura, K. (2015). Dual recollection in episodic memory. Journal of Experimental Psychology: General, 144(4), 816.
- Erdfelder, E., Auer, T. S., Hilbig, B. E., Aßfalg, A., Moshagen, M., & Nadarevic, L. (2009). Multinomial processing tree models: A review of the literature. Zeitschrift für Psychologie/Journal of Psychology, 217(3), 108.
- Nieznański, M. (2020). Levels-of-processing effects on context and target recollection for words and pictures. Acta Psychologica, 209, 103127.
- Obidziński, M. & Nieznański, M. (in review). Context and target recollection for words and pictures in young adults with developmental dyslexia.
