Amrendra Pratap Singh

@allduniv.ac.in

Assistant Professor, Centre of Behavioral and Cognitive Sciences
University of Allahabad

Amrendra Pratap Singh


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https://researchid.co/amrendra007

RESEARCH, TEACHING, or OTHER INTERESTS

Cognitive Neuroscience, Behavioral Neuroscience, Experimental and Cognitive Psychology
5

Scopus Publications

84

Scholar Citations

5

Scholar h-index

4

Scholar i10-index

Scopus Publications

  • Validation of Neuphony 8-channel EEG flex cap: a comparative study with BioSemi 64-channel EEG system
    Ankita Rani, Amrendra Singh, Sudhakar Mishra
    Frontiers in Neuroscience, 2026
    Background Electroencephalography (EEG) is a widely used tool in neurological assessment and cognitive research due to its reliability, high temporal resolution, and non-invasive nature. While portable EEG systems offer improved accessibility, many rely on electrode caps or extensive electrode arrays, which limit ease of use and portability in applied settings. The present study aimed to evaluate whether the 8-channel wearable Neuphony EEG flex cap can reliably capture key event-related potential (ERP) components such as P300 and mismatch negativity (MMN), while also providing robust measures of continuous EEG activity. Methods This study involved 25 healthy participants, with an average age of 19.72 ± 0.8 years. EEG recordings were obtained using the Neuphony Flex Cap and BioSemi system while subjects engaged in the following tasks: resting state, auditory oddball, and visual discrimination tasks. Participants were instructed to keep their eyes open and concentrate on a cross during the resting state recording. Two distinct sound tones were played during the auditory oddball task to elicit P300 and MMN responses. For the visual discrimination task, participants were asked to respond upon seeing either an M or a W among distractors. Accuracy and reaction times were recorded for both tasks. Results We evaluated the average relative PSD of the Neuphony EEG flex cap and BioSemi Active Two system across the entire frequency range (1–30 Hz), revealing a significant difference in the 8 to 13 Hz band. A repeated measures ANOVA showed a significant main effect of device for P300 amplitude [ F (1, 24) = 271.59, p < 0.001, ηp 2 = 0.919] and P300 latency [ F (1, 24) = 8298.6, p < 0.001, partial η 2 = 0.997] reflecting overall differences in recording between devices. Similarly for Late Positive Complex (LPC), a repeated measure ANOVA showed a significant main effect of device for amplitude [ F (1, 24) = 16.44, p = 0.00046, partial η 2 = 0.406] and latency [ F (1, 24) = 7094.90, p < 0.001, partial η 2 = 0.997]. Discussion This research indicated that it is feasible to obtain fair-quality EEG data for research purposes using the Neuphony EEG flex cap. However, the strength of the frequency band between 8 and 13 Hz showed variability, as did the event-related peaks. Event-related potentials (ERPs) were comparable for both devices, with a slight consistent delay in the 8-channel Neuphony EEG flex cap, potentially due to Bluetooth signal transmission.
  • Concentrative (Sahaj Samadhi) meditation expands subjective time
    Amrendra Singh, Narayanan Srinivasan
    Psych Journal, 2019
    Previous studies have demonstrated the effect of mindfulness meditation on subjective experience of time. Task difficulty influenced subjective experience of time with larger subjective expansion of time among meditators with a more difficult task. It is not clear whether the effect would generalize to concentrative meditation training. Hence, in the present study, using a temporal bisection task, we investigated the effect of task difficulty (with two discrimination ratios of short and long durations) on subjective experience of time in long-term concentrative (Sahaj Samadhi) meditators and non-meditators. The results provide evidence for subjective expansion of time among long-term concentrative meditators, which is in line with the previous findings with mindfulness meditators. Similar to the earlier study with mindfulness meditators, we also found expansion of time for concentrative meditators only in the difficult task condition where attentional demands are high and less attentional resources are available for processing time. The findings suggest that subjective expansion of time is most likely a general effect of attentional enhancement irrespective of the type of meditation practice.
  • Concentrative (Sahaj Samadhi) meditation training and visual awareness: An fMRI study on color afterimages
    Amrendra Singh, V.S. Chandrasekhar Pammi, Anupam Guleria, Narayanan Srinivasan
    Progress in Brain Research, 2019
  • The effect of sadness on global-local processing
    Adrian von Mühlenen, Lauren Bellaera, Amrendra Singh, Narayanan Srinivasan
    Attention Perception and Psychophysics, 2018
  • Concentrative Meditation Influences Visual Awareness: a Study with Color Afterimages
    Narayanan Srinivasan, Amrendra Singh
    Mindfulness, 2017

RECENT SCHOLAR PUBLICATIONS

  • Validation of Neuphony 8-channel EEG flex cap: a comparative study with BioSemi 64-channel EEG system
    A Rani, A Singh, S Mishra
    Frontiers in Neuroscience 19, 1670860 , 2025
    2025
  • Immersive VR vs. Auditory-Guided Mindfulness: An fMRI Investigation of Resting-State Brain Networks
    S Sharma, A Singh
    Aperture Neuro. (2025, June 13). OHBM 2025 Annual Meeting Abstract Book … , 2025
    2025
  • Dissociating Neural Correlates of Conscious Perception and Reportability Using Color Afterimage
    R Kaur, A Singh
    Aperture Neuro. (2025, June 13). OHBM 2025 Annual Meeting Abstract Book … , 2025
    2025
  • Understanding the Temporal oddball effect: Investigating the role of repetition suppression and Anticipation.
    S Mani, S Raha, A Singh
    Annual Confernece of Cognitive Science (ACCS) - 2024, India, 175-177 , 2024
    2024
  • Investigating the effect of Socio-economic Status (SES) on Brain Structural Integrity: A Diffusion Tensor Imaging (DTI) Study
    A Singh, K Rai, S Raha
    Annual Conference of Cognitive Science (ACCS) - 2024, India, 233-235 , 2024
    2024
  • Investigating the role of repetition suppression in temporal oddball effect
    S Mani, S Raha, A Singh
    Fechner Day 2024 - International Society for Psychophysic, 88-93, , 2024
    2024
  • Concentrative (Sahaj Samadhi) meditation expands subjective time
    A Singh, N Srinivasan
    PsyCh journal 8 (1), 28-35 , 2019
    2019
    Citations: 14
  • Concentrative (Sahaj Samadhi) meditation training and visual awareness: An fMRI study on color afterimages
    A Singh, VSC Pammi, A Guleria, N Srinivasan
    Progress in Brain Research 244, 185-206 , 2019
    2019
    Citations: 5
  • The effect of sadness on global-local processing.
    A Mühlenen, L Bellaera, A Singh, N Srinivasan
    Attention, Perception, & Psychophysics , 2018
    2018
    Citations: 11
  • The effect of sadness on global-local processing
    A von Mühlenen, L Bellaera, A Singh, N Srinivasan
    Attention, Perception, & Psychophysics 80 (5), 1072-1082 , 2018
    2018
    Citations: 35
  • Concentrative meditation influences visual awareness: a study with color afterimages
    N Srinivasan, A Singh
    Mindfulness 8 (1), 17-26 , 2017
    2017
    Citations: 19

MOST CITED SCHOLAR PUBLICATIONS

  • The effect of sadness on global-local processing
    A von Mühlenen, L Bellaera, A Singh, N Srinivasan
    Attention, Perception, & Psychophysics 80 (5), 1072-1082 , 2018
    2018
    Citations: 35
  • Concentrative meditation influences visual awareness: a study with color afterimages
    N Srinivasan, A Singh
    Mindfulness 8 (1), 17-26 , 2017
    2017
    Citations: 19
  • Concentrative (Sahaj Samadhi) meditation expands subjective time
    A Singh, N Srinivasan
    PsyCh journal 8 (1), 28-35 , 2019
    2019
    Citations: 14
  • The effect of sadness on global-local processing.
    A Mühlenen, L Bellaera, A Singh, N Srinivasan
    Attention, Perception, & Psychophysics , 2018
    2018
    Citations: 11
  • Concentrative (Sahaj Samadhi) meditation training and visual awareness: An fMRI study on color afterimages
    A Singh, VSC Pammi, A Guleria, N Srinivasan
    Progress in Brain Research 244, 185-206 , 2019
    2019
    Citations: 5
  • Validation of Neuphony 8-channel EEG flex cap: a comparative study with BioSemi 64-channel EEG system
    A Rani, A Singh, S Mishra
    Frontiers in Neuroscience 19, 1670860 , 2025
    2025
  • Immersive VR vs. Auditory-Guided Mindfulness: An fMRI Investigation of Resting-State Brain Networks
    S Sharma, A Singh
    Aperture Neuro. (2025, June 13). OHBM 2025 Annual Meeting Abstract Book … , 2025
    2025
  • Dissociating Neural Correlates of Conscious Perception and Reportability Using Color Afterimage
    R Kaur, A Singh
    Aperture Neuro. (2025, June 13). OHBM 2025 Annual Meeting Abstract Book … , 2025
    2025
  • Understanding the Temporal oddball effect: Investigating the role of repetition suppression and Anticipation.
    S Mani, S Raha, A Singh
    Annual Confernece of Cognitive Science (ACCS) - 2024, India, 175-177 , 2024
    2024
  • Investigating the effect of Socio-economic Status (SES) on Brain Structural Integrity: A Diffusion Tensor Imaging (DTI) Study
    A Singh, K Rai, S Raha
    Annual Conference of Cognitive Science (ACCS) - 2024, India, 233-235 , 2024
    2024
  • Investigating the role of repetition suppression in temporal oddball effect
    S Mani, S Raha, A Singh
    Fechner Day 2024 - International Society for Psychophysic, 88-93, , 2024
    2024