The design research is constructed by the theory on making energy consumption lower and concrete steps on how to achieve it. In this respect two parts of the research stack up in terms of their cohesiveness with the main idea of the research. The internal validity of the research can be shaped in its direction to the common features applicable for designing rational approaches to solving the problem. However, the research maintained in the first part needs more observation from the part of previous (earlier) studies evaluating the issue of energy consumption. The question is that the theory can be clearly recognized in the sum of viewpoints on how to improve the situation. This is why the experience of the past could serve, as a great argument for the research.
The second part of the research that is concerned with measuring design matters has rather an attractive outlook. It is due to the essence of direct facts and assumptions on the topic of the research. Secondly, it is full of formulae describing relations between U-values and R-values. However, the choice of building (single story home) is not that fascinating. The most of the population in Europe and in the United States are living or working in multi-story buildings. It is considered with the demographic situation in countries of the world. For instance, the examples of Mayor House (in the form of glob) and Business Center (in the form of cucumber) in London can be realized as energy-saving buildings. What is more, the idea of materials with the law of thermal conductivity ought to be extended in detail.
Looking at the picture of possible threats to the internal validity of the research in its measurement the results vary. Thus, in terms of historic factors, there are no mismatches found in the research. The references and various statements do not contradict their sequence in the research. According to maturation factor, the research is readymade in features of its direct putting into practice. It means that the participants involved in the project can improve on their performance in issue on energy consumption easily.
The instrumentation in the research is stable in both parts. Thus, mainly rational theoretical and formula-based tools are described to have a clear idea about the research. The observation in two parts of the research gave no statistical regression. However, the threat in this respect is implied by the fact that there is no remark on the subjects involved in the realization of the research. A generally viable idea on the ecologically applicable means for architecture encounters a threat of experimental mortality. In this respect current situation outlines that not all participants in such an initiative would share the main idea of the research. On the other hand, the internal validity of the work is under the threat of the John Henry effect. It is so, because the innovative character of the research can probably be realized with the innovations, as such, but not with the role of innovators.
All in all, the internal validity of the research shows that the experimental treatment provides a mere extent of new features that could somehow make difference in terms of research significance. Thus, treatment and observation are well-exposed in the research. It is concerned with its general significance for humanity in the current stage of development.
Reference
Part 1. Design matters-conceptualize it.
Part 2. Design matters-measure it.