Main evidence and numbers
| Version | Wetin dem dey track | Scoring detail wey matter |
|---|---|---|
| Single visual n-back | One stream of visual identity or location | Matches, wrong alarms and response timing |
| Single auditory n-back | One sound stream | How dem present audio and response rules |
| Dual n-back | Two streams at di same time | Separate-stream and combined scoring rules |
N-back research get plenty different ways to do am; e no be one standard game. Owen and colleagues show difference between identity, location and content, while di training meta-analysis look different training styles and outcomes. Because of these design differences, just talk n level no fully describe how person perform. Owen et al., 2005 Soveri et al., 2017
Wetin extra demand dual n-back add?
To monitor two streams, you need coordinate more things, but di exact difficulty depend on how dem time and score di streams. E no correct to multiply single-task score by two or subtract one fixed number of levels to estimate dual score. Working-memory theory include different representations and control processes, no be one number of slots wey apply to every task. Baddeley, 2012 Cowan, 2001
This difference also explain why one digit-span score no fit decide which version person go find easier. Span methods get different recall and processing demands, and di meta-analysis wey compare n-back with complex span reject treating dem like say na di same thing. Conway et al., 2005 Redick et al., 2013
Dual n-back better for science?
This question need clear outcome: better performance for di task wey person practise, transfer to another memory task, or improvement for broad reasoning na different things to measure. Di training meta-analysis separate these outcomes. Training wey hard pass or get more steps no automatically prove say e get bigger general benefit. Soveri et al., 2017
Wetin dey affect am?
Wetin di evidence about transfer allow us to talk?
Improvement for related tasks fit happen, especially when di assessment resemble training. Di broader review about working memory find say claims about intelligence or other far-transfer outcomes become weaker when dem use proper control comparisons. These findings no support promise say dual n-back go make person generally smarter. Melby-Lervåg et al., 2016 Soveri et al., 2017
This no mean say learning di game no get value. Person fit become more skilled for keeping di rule in mind, paying attention to di stimuli and responding correctly. Di description wey science fit support stay with di task wey dem show, or transfer outcome dem measure closely. Soveri et al., 2017
Why online levels no dey use one common scale
Speed of stimuli, how often targets show, adjustment rules, lures and time for response fit differ. Dual task wey slow fit get different demands from single task wey fast. If procedures and calibration no match, equal n labels no show equal ability, and dem no be age and sex norms wey represent everybody. Owen et al., 2005 Redick et al., 2013
Dem also need measure how reliable di particular score be, especially difference between versions. Research about reliability paradox show why experimental tasks wey give strong results fit still produce noisy individual differences. One level wey person reach once no suppose become permanent label for your working memory. Hedge et al., 2017
If you compare versions by yourself, note their details and track correct responses and wrong alarms. Treat any preference or progress as something for that task only. Di evidence no provide one best n level for everybody, guaranteed training amount, or conversion from dual-task performance to IQ. Conway et al., 2005 Melby-Lervåg et al., 2016
Try the free test wey connect to this one
N-back test
Try di n-back test and follow di version wey page describe. If you use another dual version, record am separately; no treat di n labels like one common scale. Helibrain task no prove broad training benefits.
Common questions
Dual 2-back na di same thing as single 4-back?
No. Di number show how far back di match dey; adding another stream change coordination demands, e no just double di lag. Owen et al., 2005
Dual n-back go improve every memory task?
Di reviews separate learning di task, transfer to related tasks and far transfer. Higher training score no prove broad improvement. Soveri et al., 2017 Melby-Lervåg et al., 2016
Which version I suppose use to measure IQ?
No version get direct, validated conversion from its n level to IQ. Different working-memory tasks no be interchangeable. Redick et al., 2013
Sources
- Owen et al. (2005). N‐back working memory paradigm: Meta-analysis of normal functional brain-imaging studies.
- Redick et al. (2013). Complex span and n-back measures of working memory: Meta-analysis.
- Cowan (2001). Di magical number 4 for short-term memory: Another look at mental storage capacity.
- Baddeley (2012). Working Memory: Theories, Models, and Controversies.
- Conway et al. (2005). Working memory span tasks: Method review and guide for users.
- Soveri et al. (2017). Working memory training again: Multi-level meta-analysis of n-back training studies.
- Melby-Lervåg et al. (2016). Working Memory Training no improve intelligence scores or other “far transfer” measures.
- Hedge et al. (2017). Di reliability paradox: Why strong cognitive tasks no produce reliable individual differences.
Cite dis page: Wetin be di difference between single and dual n-back?. Helibrain. 2026. https://helibrain.com/pcm/answers/single-vs-dual-n-back. CC BY 4.0.
← Check more ansa dem