Adonis Diaries

Posts Tagged ‘methodologies

Article #29, December 1st, 2005

“How objective and scientific are research?”

Would you please give me a minute to set the foundations first? Friend, allow me just a side explanation on experimentation.  Psychologists, sociologists and marketing graduates are trained to apply various experimentation methods and not just cause and effects designs.  There are many statistical packages oriented to providing dimensions and models to the set of data dumped into the experiment so that a preliminary understanding of the system behavior is comprehended qualitatively.

Every applied science has gone through many qualitative models or schemas, using various qualitative methods, before attempting to quantify their models. However, many chairmen of engineering departments, especially those who have no understanding of the disciple of Human Factors or were never exposed to designing experiments, have a conception that this field is mostly qualitative in nature and would ask me to concentrate in my courses on the quantitative aspects such as the environmental factors of lighting, noise, heat and any topic that requires computation or has well defined physics equations.

We have three concepts in the title: objectivity, scientific and research that are related in people’s mind as connoting the same concept.  However, the opposite meanings for these concepts are hard to come by without philosophical divergences or assumptions.  If we define science as a set of historical paradigms, a set of concepts, truths, facts and methods that most of them keep changing as new technologies and new methodologies enlarge the boundaries of knowledge then you might be more inclined to discuss notions with a freer mind.

Could subjectivity be accepted as the opposite of objectivity without agreeing on a number of axioms and assumptions that are not tenable in many cases?  Any agreement in the meanings of objectivity in scientific research procedures and results are basically consensual among the professionals in a discipline, for a period, until the advent of a new paradigm that changes the meaning or orientation of the previous consensus among the professionals.

Could opinions, personal experiences, recalled facts or events not be accepted in the domain of research even if they could be found in written documents but not thoroughly investigated by a researcher?  So what if you refer to an accredited research article and then it turned out that the article was fraught with errors, misleading facts with borderline results and untenable interpretations?  Would the research be thrown in the dust bin as unscientific or non objective and thus not worth further investigations?

Research in Physics, Chemistry and engineering deal with objects and are related to studying the behavior of the physical nature; these kind of research can arrive to well establish mathematical models because the factors are countable, could be well controlled in experimental settings and the variability in errors are connected to the technology of the measuring instruments once the procedure is well defined and established according to experimental standards.  It is when research has to deal with the variability in the human nature such as in psychology, psychometric, sociology, marketing, business management and econometrics that the notions of objectivity, research and science become complex and confusing.

The main problem is to boldly discriminate among research and admit that not every research is necessarily scientific or objective and that a research has an intrinsic value if the investigator is candid about the purpose and nature of his research.  We need to admit that every research is subjective in nature because it is the responsibility of the investigator to select his topic, his intentions, his structured theory, references, fund providers, the hypotheses, the design, the methodology, the sample size, the populations, the data collection techniques, the statistical package, emphasis on either error type I or error type II, the interpretation of results and so on. 

By admitting prior subjective environment to a research endeavor then we can proffer the qualitative term of objectivity to the research only and only when the investigators provide full rationales to every subjective choices in the research process.

Every step in the research process is a variation on an accepted paradigm at one point in the history of science and the mixing of paradigms with no conscious realization of the mixing process should set a warning alarm on the validity of the research and the many pitfalls it is running through.  

Acknowledging the role of subjectivity in the methodology, the data and its interpretation could open the way for more accurate and flexible judgments as to the extent of objectivity and scientific tendencies of the research.

Article #8, April 5, 2005

“What do you design again?”

Human Factors are primarily oriented to designing interfaces between systems and end users/operators.  Of the many interfaces two interfaces are common to people and can be grouped into two main categories: displays and controls. 

Designing the arrangements of displays and controls on consoles for utility companies, aircraft, trains, and automobiles according to applicable guidelines are examples.

Operators and end users need to receive information on the status of a complex system and be able to respond to this information through a control device. Thus, once a designer knows what needs to be controlled in a system and how, then the required types of displays follow.

Displays and controls can become complex devices if not designed to targeted users.

The design of the cockpit interface in airplanes is different from cars, trains or ships.

The design or the interface in cellular phones is different from computer games or computer screens, keyboards and mouse.

A good knowledge of the physical and mental abilities and requirements of the target end users are paramount in the design of any interface if efficiency, affordability, acceptability, maintainability, safety and health are the prerequisite to wide spread demands and marketability.

How the functions and tasks of any subsystems should be allocated, to human or to an automated machine? 

What are the consequences in emergency situations for any allocation strategy? 

What are the consequences of an allocation when a system is exported to Third World countries? 

What are the consequences of function allocation to employment, safety risks, health risks and long term viability of any system?

Who usually are in charge of designing interfaces that require multidisciplinary knowledge?

Given that any of these designs require inputs from marketing experts, psychologists, sociologists, economists, engineers, statisticians and legal experts on the liabilities of these designed objects for safe and healthy usage then who should be responsible for designing interfaces?

Teams of professionals should necessarily be involved in interface designs but because time being of the essence in business competition and cost to a lesser extent many of these interfaces are relegated to engineers applying published standards or relying on personal experience and previous models from competitors.

Human Factors data on the physical and mental limitations and capabilities of target users should be part of any standard book for designing interfaces.

Human Factors methodologies need to be disseminated so that viable interfaces could fit the characteristics of the end users.

The Human Factors professionals failed in their first three decades of existence to recognize that their main purpose was to design interfaces, to design practical system and to orient their research toward engineers who could readily use their data in designing systems.

If this trend of targeting engineers in our research papers continues then this profession could make a serious dent in sending the proper message and open up a market for the thousands of Human Factors graduates who should be needed in the design of systems interfaces.


adonis49

adonis49

adonis49

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