Tags » Experimental Design

Are two years’ data better than one?

Photo: Two giraffes by Vera Kratochvil, released to public domain, via publicdomainpictures.net. Two giraffes are definitely better than one.

Ecologists are perennially angst-ridden about sample size.  853 more words


Accuracy and precision

Written by Andy Connelly. Published 15th May 2017.


In science, words matter and their meanings matter even more. It might be too much to say that some scientific texts read like poetry; however, the ideas in those texts can certainly be beautiful. 738 more words


Creating Choice Based Conjoint Manipulations Programmatically with GIMP

I am doing a discrete choice experiment design for a project that we are just starting. The idea is to present screenshots of various app’s in an app store and ask the participants to pick one. 178 more words


Should we account for imperfect detection when evaluating patterns in fish abundance?

Our recent paper sheds light on the issue of imperfect detection when evaluating patterns in fish abundance. We synthesize the information from numerous studies to develop a realistic expectation of when and how the detection probability should vary when sampling fish. 827 more words

Access to credits improves food security and production in small holder households of Jinotega, Nicaragua

Many of the Central American families that produce the coffee we love to brew suffer from poverty and chronic food insecurity. In 2016, R4Dsct conducted a food security assessment within the “Mejoramiento de la Seguridad Alimentaria de Productores y Productoras de Café Asociados a UCA SOPPEXCCA R.L.” program. 716 more words

Monitoring And Evaluation

Virtual ecologist module #3: occupancy model power analysis

The Virtual Ecologist refers to the practice of simulating complete experimental designs, that is, the ecological process, the observation process and the statistical analysis. This simulation tool can be used to evaluate trade-offs among experimental design components when design complexity prevents the use of traditional power analysis. 1,799 more words