Professor Jane Noyes

Athro

  1. 2016
  2. Cyhoeddwyd

    Prioritising wheelchair services for children: a pilot discrete choice experiment to understand how child wheelchair users and their parents prioritise different attributes of wheelchair services

    Bray, N., Yeo, S. T., Noyes, J., Harris, N. & Edwards, R. T., 19 Gorff 2016, Yn: Pilot and Feasibility Studies. 2, 32, 14 t.

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  3. Cyhoeddwyd

    Extent, Awareness and Perception of Dissemination Bias in Qualitative Research: An Explorative Survey

    Toews, I., Glenton, C., Lewin, S., Berg, R. C., Noyes, J., Booth, A., Marusic, A., Malicki, M., Munthe-Kaat, H. M. & Meerpohl, J. M., 3 Awst 2016, Yn: PLoS ONE. 11, 8, e0159290.

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  4. Cyhoeddwyd

    Factors that impact on the use of mechanical ventilation weaning protocols in critically ill adults and children: A qualitative evidence-synthesis

    Jordan, J., Rose, L., Dainty, K. N., Noyes, J. & Blackwood, B., 4 Hyd 2016, Yn: Cochraine Database of Systematic Reviews. 2016, 10, CD011812.

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  5. Cyhoeddwyd

    The Concept of Resilience in Children’s Health and Social Care Policy

    Noyes, J., Tach 2016, Child and Adolescent Resilience within medical contexts: Integrating Research and Practice. DeMitchelis, C. & Ferrari, M. (gol.). 1st gol. Springer, t. 247-263 16 t.

    Allbwn ymchwil: Pennod mewn Llyfr/Adroddiad/Trafodion CynhadleddPennodadolygiad gan gymheiriaid

  6. Cyhoeddwyd

    Systematic review of physical activity and exercise interventions to improve health, fitness and well-being of children and young people who use wheelchairs

    O'Brien, T. D., Noyes, J., Spencer, L. H., Kubis, H-P., Hastings, R. P. & Whitaker, R., 15 Tach 2016, Yn: BMJ Open Sport & Exercise Medicine. 2, 1, e000109.

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  7. 2017
  8. Cyhoeddwyd

    Promoting high quality research with life-limited children and their families: Establishment of a joint research group between Together for Short Lives and the Association for Paediatric Palliative Medicine

    Bluebond-Langner, M., Chambers, L., Lapwood, S. & Noyes, J., Chwef 2017, Yn: Journal of Advanced Nursing. 73, 2, t. 283-285 3 t.

    Allbwn ymchwil: Cyfraniad at gyfnodolynGolygyddiad

  9. Cyhoeddwyd

    Assessing the complexity of interventions within systematic reviews: development, content and use of a new tool (iCAT_SR)

    Lewin, S., Hendry, M., Chandler, J., Oxman, A. D., Michie, S., Shepperd, S., Reeves, B. C., Tugwell, P., Hannes, K., Rehfuess, E. A., Welch, V., Mckenzie, J. E., Burford, B., Petkovic, J., Anderson, L. M., Harris, J. & Noyes, J., 26 Ebr 2017, Yn: BMC Medical Research Methodology. 17, 1, 13 t., 76.

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  10. Cyhoeddwyd

    Conceptualization of physical exercise and keeping fit by child wheelchair users and their parents

    Noyes, J., Spencer, L. H., Bray, N., Kubis, H-P., Hastings, R. P., Jackson, M. & O'Brien, T. D., Mai 2017, Yn: Journal of Advanced Nursing. 73, 5, t. 1111-1123 13 t.

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  11. Cyhoeddwyd

    Factors that impact on recruitment to randomised trials in health care: a qualitative evidence synthesis

    Noyes, J., 22 Mai 2017, Yn: Cochrane Database of Systematic Reviews. 5, 13 t., MR000045.

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygl adolyguadolygiad gan gymheiriaid

  12. Cyhoeddwyd

    Defining health-related quality of life for young wheelchair users: A qualitative health economics study

    Bray, N., Noyes, J., Harris, N. & Edwards, R. T., 15 Meh 2017, Yn: PLoS ONE. 12, 6, t. e0179269

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  13. Cyhoeddwyd

    Use of sociological theories and models in research

    Noyes, J., Gorff 2017, Yn: Journal of Advanced Nursing. 73, 7, t. 1538

    Allbwn ymchwil: Cyfraniad at gyfnodolynGolygyddiad

  14. Cyhoeddwyd

    A Systematic Review of Literature on Effectiveness of Training in Emergency Risk Communication

    Miller, A. N., Sellnow, T., Neuberger, L., Todd, A., Freihaut, R., Noyes, J., Allen, T., Alexander, N., Vanderford, M. & Gamhewage, G., 6 Gorff 2017, Yn: Journal of Health Communication. 22, 7, t. 612-629 19 t.

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  15. Cyhoeddwyd

    Further exploration of dissemination bias in qualitative research required to facilitate assessment within qualitative evidence syntheses

    Toews, I., Booth, A., Berg, R. C., Lewin, S., Glenton, C., Munthe-Kaas, H. M., Noyes, J., Schroter, S. & Meerpohl, J. M., Awst 2017, Yn: Journal of Clinical Epidemiology. 88, August, t. 133-139

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  16. Cyhoeddwyd

    Potential value of systematic reviews of qualitative evidence in informing user-centered health and social care: findings from a descriptive overview

    Dalton, J., Booth, A., Noyes, J. & Sowden, A. J., Awst 2017, Yn: Journal of Clinical Epidemiology. 88, August, t. 37-46

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  17. Cyhoeddwyd

    Measuring the health-related quality of life of children with impaired mobility: examining correlation and agreement between children and parent proxies

    Bray, N., Noyes, J., Harris, N. & Edwards, R. T., 10 Awst 2017, Yn: BMC Research Notes. 10, 1, t. 377

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  18. Cyhoeddwyd

    Intervention Now to Eliminate Repeat Unintended Pregnancy in Teenagers (INTERUPT): a systematic review of intervention effectiveness and cost-effectiveness, and qualitative and realist synthesis of implementation factors and user engagement

    Aslam, R. W., Hendry, M., Booth, A., Carter, B., Charles, J. M., Craine, N., Edwards, R. T., Noyes, J., Ntambwe, L. I., Pasterfield, D., Rycroft-Malone, J., Williams, N. & Whitaker, R., 15 Awst 2017, Yn: BMC Medicine. 15, 1, t. 155

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  19. Cyhoeddwyd

    AHRQ Series on Complex Intervention Systematic Reviews - Paper 2: Defining Complexity, Formulating Scope and Questions

    Kelly, M. P., Noyes, J., Kane, R. L., Chang, C., Uhl, S., Robinson, K. A., Springs, S., Butler, M. E. & Guise, J-M., Hyd 2017, Yn: Journal of Clinical Epidemiology. 90, October, t. 11-18

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  20. Cyhoeddwyd

    AHRQ Series on Complex Intervention Systematic Reviews - Paper 5: Advanced Analytic Methods

    Pigott, T., Noyes, J., Umscheid, C. A., Myers, E., Morton, S. C., Fu, R., Sanders-Schmidler, G. D., Devine, E. E. B., Murad, M. H., Kelly, M. P., Fonnesbeck, C., Petticrew, M., Kahwati, L. & Beretvas, S. N., Hyd 2017, Yn: Journal of Clinical Epidemiology. 90, October, t. 37-42

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  21. Cyhoeddwyd

    Family attitudes, actions, decisions and experiences following implementation of deemed consent and the Human Transplantation (Wales) Act 2013: mixed-method study protocol

    Noyes, J., Morgan, K., Walton, P., Roberts, A., Mclaughlin, L. & Stephens, M., 12 Hyd 2017, Yn: BMJ Open. 7, 10, t. e017287

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  22. Cyhoeddwyd

    Evaluation of Local Authority Population Needs Assessment Reports

    Vinnicombe, S. & Noyes, J., Rhag 2017, https://ncphwr.org.uk/wp-content/uploads/2019/03/Local-Authority-Population-Assessment-Reports-FINAL.pdf: National Centre for Population Health and Wellbeing Research. 17 t.

    Allbwn ymchwil: Llyfr/AdroddiadAdroddiad Comisiwn

  23. 2018
  24. Cyhoeddwyd

    Applying GRADE-CERQual to qualitative evidence synthesis findings: introduction to the series

    Lewin, S., Booth, A., Glenton, C., Munthe-Kaas, H., Rashidian, A., Wainwright, M., Bohren, M. A., Tunçalp, Ö., Colvin, C. J., Garside, R., Carlsen, B., Langlois, E. V. & Noyes, J., 25 Ion 2018, Yn: Implementation Science. 13, Suppl 1, t. 2

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  25. Applying GRADE-CERQual to qualitative evidence synthesis findings-paper 2: how to make an overall CERQual assessment of confidence and create a Summary of Qualitative Findings table

    Lewin, S., Bohren, M., Rashidian, A., Munthe-Kaas, H., Glenton, C., Colvin, C. J., Garside, R., Noyes, J., Booth, A., Tunçalp, Ö., Wainwright, M., Flottorp, S., Tucker, J. D. & Carlsen, B., 25 Ion 2018, Yn: Implementation Science. 13, Suppl 1, t. 10

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  26. Cyhoeddwyd

    Applying GRADE-CERQual to qualitative evidence synthesis findings-paper 3: how to assess methodological limitations

    Munthe-Kaas, H., Bohren, M. A., Glenton, C., Lewin, S., Noyes, J., Tunçalp, Ö., Booth, A., Garside, R., Colvin, C. J., Wainwright, M., Rashidian, A., Flottorp, S. & Carlsen, B., 25 Ion 2018, Yn: Implementation Science. 13, Suppl 1, t. 9

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  27. Cyhoeddwyd

    Applying GRADE-CERQual to qualitative evidence synthesis findings-paper 4: how to assess coherence

    Colvin, C. J., Garside, R., Wainwright, M., Munthe-Kaas, H., Glenton, C., Bohren, M. A., Carlsen, B., Tunçalp, Ö., Noyes, J., Booth, A., Rashidian, A., Flottorp, S. & Lewin, S., 25 Ion 2018, Yn: Implementation Science. 13, Suppl 1, t. 13

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  28. Cyhoeddwyd

    Applying GRADE-CERQual to qualitative evidence synthesis findings-paper 5: how to assess adequacy of data

    Glenton, C., Carlsen, B., Lewin, S., Munthe-Kaas, H., Colvin, C. J., Tunçalp, Ö., Bohren, M. A., Noyes, J., Booth, A., Garside, R., Rashidian, A., Flottorp, S. & Wainwright, M., 25 Ion 2018, Yn: Implementation Science. 13, Suppl 1, t. 14

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  29. Applying GRADE-CERQual to qualitative evidence synthesis findings-paper 6: how to assess relevance of the data

    Noyes, J., Booth, A., Lewin, S., Carlsen, B., Glenton, C., Colvin, C. J., Garside, R., Bohren, M. A., Rashidian, A., Wainwright, M., Tunςalp, Ö., Chandler, J., Flottorp, S., Pantoja, T., Tucker, J. D. & Munthe-Kaas, H., 25 Ion 2018, Yn: Implementation Science. 13, Suppl 1, t. 4

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  30. Cyhoeddwyd

    Applying GRADE-CERQual to qualitative evidence synthesis findings-paper 7: understanding the potential impacts of dissemination bias

    Booth, A., Lewin, S., Glenton, C., Munthe-Kaas, H., Toews, I., Noyes, J., Rashidian, A., Berg, R. C., Nyakang'o, B., Meerpohl, J. J. & GRADE-CERQual Coordinating Team, 25 Ion 2018, Yn: Implementation Science. 13, Suppl 1, t. 12

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  31. Cyhoeddwyd

    Cochrane Qualitative and Implementation Methods Group guidance paper: reporting guidelines for qualitative, implementation, and process evaluation evidence syntheses

    Flemming, K., Booth, A., Hannes, K., Cargo, M. & Noyes, J., Mai 2018, Yn: Journal of Clinical Epidemiology. 97, May, t. 79-85

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  32. Cyhoeddwyd

    Cochrane Qualitative and Implementation Methods Group guidance paper 4: methods for assessing evidence on intervention implementation

    Cargo, M., Harris, J., Pantoja, T., Booth, A., Harden, A., Hannes, K., Thomas, J., Flemming, K., Garside, R. & Noyes, J., Mai 2018, Yn: Journal of Clinical Epidemiology. 97, May, t. 59-69

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  33. Cyhoeddwyd

    Cochrane Qualitative and Implementation Methods Group guidance paper 5: methods for integrating qualitative and implementation evidence within intervention effectiveness reviews

    Harden, A., Thomas, J., Cargo, M., Harris, J., Pantoja, T., Flemming, K., Booth, A., Garside, R., Hannes, K. & Noyes, J., Mai 2018, Yn: Journal of Clinical Epidemiology. 97, May, t. 70-78

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  34. Cyhoeddwyd

    Cochrane Qualitative and Implementation Methods Group guidance paper 6: Methods for question formulation, searching, and protocol development for qualitative evidence synthesis

    Harris, J. L., Booth, A., Cargo, M., Hannes, K., Harden, A., Flemming, K., Garside, R., Pantoja, T., Thomas, J. & Noyes, J., Mai 2018, Yn: Journal of Clinical Epidemiology. 97, May, t. 39-48

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  35. Cyhoeddwyd

    Cochrane Qualitative and Implementation Methods Group guidance paper 3: methods for assessing methodological limitations, data extraction and synthesis, and confidence in synthesized qualitative findings

    Noyes, J., Booth, A., Flemming, K., Garside, R., Harden, A., Lewin, S., Pantoja, T., Hannes, K., Cargo, M. & Thomas, J., Mai 2018, Yn: Journal of Clinical Epidemiology. 97, May, t. 49-58

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  36. Cyhoeddwyd

    Cochrane Qualitative and Implementation Methods Group guidance series-paper 1: Introduction

    Noyes, J., Booth, A., Cargo, M., Flemming, K., Garside, R., Hannes, K., Harden, A., Harris, J., Lewin, S., Pantoja, T. & Thomas, J., Mai 2018, Yn: Journal of Clinical Epidemiology. 97, May, t. 35-38

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  37. Cyhoeddwyd

    Structured methodology review identified seven (RETREAT) criteria for selecting qualitative evidence synthesis approaches

    Booth, A., Noyes, J., Flemming, K., Gehardus, A., Wahlster, P., Jan van der Wilt, G., Mozygemba, K., Refolo, P., Sacchini, D., Tummers, M. & Rehfuess, E., Gorff 2018, Yn: Journal of Clinical Epidemiology. 99, t. 41-52

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygl adolyguadolygiad gan gymheiriaid

  38. Cyhoeddwyd

    Which studies should be registered on a clinical trials registry?

    Noyes, J., 11 Gorff 2018, Yn: Journal of Advanced Nursing.

    Allbwn ymchwil: Cyfraniad at gyfnodolynGolygyddiad

  39. Cyhoeddwyd

    Why is transition between child and adult services a dangerous time for young people with chronic kidney disease? A mixed-method systematic review

    Dallimore, D., Neukirchinger, B. & Noyes, J., 2 Awst 2018, Yn: PLoS ONE. 13, 8, e0201098.

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  40. Cyhoeddwyd

    Social care and older people with chronic kidney disease: a mixed-method narrative review

    Neukirchinger, B., McLaughlin, L., Roberts, N. & Noyes, J., Hyd 2018, Bangor University/Wales Kidney Research Unit.

    Allbwn ymchwil: Llyfr/AdroddiadAdoddiad Arall

  41. Cyhoeddwyd

    The value of hospices in North Wales- A collaboration between academia and third sector organisations

    Hughes, N., Noyes, J., Jones, C. & Pritchard, T., 26 Tach 2018, Yn: BMJ Supportive and Palliative Care. 8, Supp 2, t. A90

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygl Cynhadleddadolygiad gan gymheiriaid

  42. Cyhoeddwyd

    Conflicting realities experienced by children with life-limiting and life-threatening conditions when transitioning to adult health services

    Noyes, J., Pritchard, S., Pritchard, A., Bennett, V. & Rees, S., Rhag 2018, Yn: Journal of Advanced Nursing. 74, 12, t. 2871-2881 11 t.

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  43. Cyhoeddwyd

    Health-Related Disaster Communication and Social Media: Mixed-Method Systematic Review

    Eckert, S., Sopory, P., Day, A., Wilkins, L., Padgett, D., Novak, J., Noyes, J., Allen, T., Alexander, N., Vanderford, M. & Gamhewage, G., Rhag 2018, Yn: Health Communication. 33, 12, t. 1389-1400 12 t.

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  44. 2019
  45. Cyhoeddwyd

    Communicating Uncertainty During Public Health Emergency Events: A Systematic Review

    Sopory, P., Day, A., Novak, J., Eckert, S., Wilkins, L., Padgett, D., Noyes, J., Barakji, F., Liu, J., Fowler, B. N., Guzman-Barcenas, J., Nagayko, A., Nickell, J. J., Donahue, D., Daniels, K., Allen, T., Alexander, N., Vanderford, M. L. & Gamhewage, G. M., 2019, Yn: Review of Communication Research . 7, t. 67-108

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygl adolyguadolygiad gan gymheiriaid

  46. Cyhoeddwyd

    Analysis of Local Authority Area Plans

    Vinnicombe, S. & Noyes, J., Ion 2019, National Centre for Population Health and Wellbeing Research. 16 t.

    Allbwn ymchwil: Llyfr/AdroddiadAdroddiad Comisiwn

  47. Cyhoeddwyd

    Engaging Communities in Emergency Risk and Crisis Communication: A Systematic Review and Evidence Synthesis

    Novak, J., Day, A., Sopory, P., Wilkins, L., Padgett, D., Eckert, S., Noyes, J., Allen, T. & Alexander, N., Ion 2019, Yn: Journal of International Crisis and Risk Communication Research . 2, 1, t. 61-96

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygl adolyguadolygiad gan gymheiriaid

  48. Synthesising quantitative and qualitative evidence to inform guidelines on complex interventions: clarifying the purposes, designs and outlining some methods

    Noyes, J., Booth, A., Moore, G., Flemming, K., Tunçalp, Ö. & Shakibazadeh, E., Ion 2019, Yn: BMJ Global Health. 4, Suppl 1, t. e000893

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  49. Formulating questions to explore complex interventions within qualitative evidence synthesis

    Booth, A., Noyes, J., Flemming, K., Moore, G., Tunçalp, Ö. & Shakibazadeh, E., 25 Ion 2019, Yn: BMJ Global Health. 4, Suppl 1, t. e001107

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  50. Implications of a complexity perspective for systematic reviews and guideline development in health decision making

    Petticrew, M., Knai, C., Thomas, J., Rehfuess, E. A., Noyes, J., Gerhardus, A., Grimshaw, J. M., Rutter, H. & McGill, E., 25 Ion 2019, Yn: BMJ Global Health. 4, Suppl 1, t. e000899

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  51. Qualitative evidence synthesis for complex interventions and guideline development: clarification of the purpose, designs and relevant methods

    Flemming, K., Booth, A., Garside, R., Tunçalp, Ö. & Noyes, J., 25 Ion 2019, Yn: BMJ Global Health. 4, Suppl 1, t. e000882

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  52. Taking account of context in systematic reviews and guidelines considering a complexity perspective

    Booth, A., Moore, G., Flemming, K., Garside, R., Rollins, N., Tunçalp, Ö. & Noyes, J., 25 Ion 2019, Yn: BMJ Global Health. 4, Suppl 1, t. e000840

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  53. Cyhoeddwyd

    Improving reporting of meta-ethnography: the eMERGe reporting guidance

    France, E. F., Cunningham, M., Ring, N., Uny, I., Duncan, E. A. S., Jepson, R. G., Maxwell, M., Roberts, R. J., Turley, R. L., Booth, A., Britten, N., Flemming, K., Gallagher, I., Garside, R., Hannes, K., Lewin, S., Noblit, G. W., Pope, C., Thomas, J., Vanstone, M., Higginbottom, G. M. A. & Noyes, J., 31 Ion 2019, Yn: BMC Medical Research Methodology. 19, 1, t. 25

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  54. Cyhoeddwyd

    Developing a reporting guideline to improve meta-ethnography in health research: the eMERGe mixed-methods

    Cunningham, M., France, E. F., Ring, N., Uny, I., Duncan, E. A. S., Roberts, R. J., Jepson, R. G., Maxwell, M., Turley, R. L. & Noyes, J., Chwef 2019, Yn: Health Services and Delivery Research (HS&DR). 7, 4, 21 t.

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid