Inter-rater Reliability of Participatory Evaluation Data - Brachiaria Grasses in Nyandarua

17 Pages Posted: 21 Nov 2018

See all articles by Stephen Mailu

Stephen Mailu

Kenya Agricultural and Livestock Research Organization

Festo Maro

Tanzania Commission for Science and Technology COSTECH

Date Written: October 25, 2018

Abstract

This study investigates the place of various physical attributes of 8 different Brachiaria grasses and two common grass species used by farmer — Napier and Rhodes grass. A list of 5 attributes including the ability of the grass to cover the ground, hairiness, harvesting height, pest and disease resistance and forage amount were used to evaluate these grasses in order to choose the best performers. Using this list of attributes, farmers were asked to evaluate these grasses replicated in 4 plots at the KALRO DRI Sub Centre; Ol Joro Orok. The data generated from the evaluation was subjected to a consistency check by use of the intraclass correlation coefficient. Results imply that for some less visible traits such as resistance to biotic stresses (pests and diseases), the evaluators can fail the consistency test. On the other hand, ratings for traits such as plant cover and height, which are easily observable were consistent. The discussion points to the need for careful use of methods and the need to perform reliability checks when using such participatory evaluation approaches. Whereas the paper does not provide a clinical prognosis, it provides a reminder to procedures which we think are rarely reported of are largely ignored in such participatory evaluations.

Keywords: Brachiaria, Participatory Evaluation, Rating Data

JEL Classification: Q16, B40

Suggested Citation

Mailu, Stephen and Maro, Festo, Inter-rater Reliability of Participatory Evaluation Data - Brachiaria Grasses in Nyandarua (October 25, 2018). Available at SSRN: https://ssrn.com/abstract=3274582 or http://dx.doi.org/10.2139/ssrn.3274582

Stephen Mailu (Contact Author)

Kenya Agricultural and Livestock Research Organization ( email )

Nairobi

Festo Maro

Tanzania Commission for Science and Technology COSTECH

Dar es Salaam
Tanzania

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