Where do we come from? Where are we going? These are some of the big questions biological anthropology seeks to answer, using the principles of evolution as a backdrop for formulating and testing hypotheses about humanity's past, present, and future. From this evolutionary perspective, biological anthropologists study whether it is possible to create a world that is free of health disparities between cultures, or how the last wild apes can coexist side-by-side with humans that live sustainably. Like other life scientists, biological anthropologists explore huge, intractable issues by breaking them down into a series of testable hypotheses. This creates a framework for carefully considering alternative explanations and arriving at evidence-driven conclusions. In the first topic room, entitled Scientific Underpinnings, you will meet biological anthropologists, learn how evolution serves as a backbone of their studies, and discover how these scientists go about the business of testing a hypothesis in the first place. The other three topic rooms address specialized, but central, areas of study within the field. Paleontology and Primate Evolution explores the prehistory of our closest relatives - the primates - to discover ways in which they are similar to and different from us, and to locate the origin of human characteristics within the broader context of primate adaptations. Some articles highlight individual taxonomic groups, such as the earliest fossil apes or the enigmatic Plesiadapiformes, whereas others discuss evolutionary adaptations, changing primate habitats, or the methods used by paleontologists. The Human Fossil Record room focuses on the paleoanthropological evidence for hominin evolution over the last 7 million years. Some articles describe how artifacts and ancient hominin remains are analyzed and how scientists infer biology and behavior from these remains. Others illustrate how scientists use geological context and associated animals and plants to help reconstruct the ancient environments where hominins lived and died. In this topic room you will also find articles on the ways ancient physical evidence is used to identify species and build the hominin family tree, allowing us to reconstruct our complex evolutionary history over deep time and vast geographic space. The other topic room Living Primates explores the amazing diversity of prosimians, monkeys and apes - where they live and how they interact with other species. Here you will find articles on such topics as why primates live in social groups, how primates communicate, and why male primates sometimes commit infanticide. You can learn how primates can be used as living analogs to our distant past as well as what the future may hold for them.
Instructions: Please read through the following description of the scientific method, watching videos, and following links where indicated. After the lab introduction, you will get to Lab Activity 1. As you complete the activities and reflection questions, please fill out your answers on the answer sheet provided in Blackboard. All activities and questions you need to complete have been highlighted. You may submit them as digital assignments, or as hard copies in class. The scientific method is a process for empirically testing possible answers to questions about natural phenomena in ways that may be repeated and verified. The questions arise from our observations of the world around us. The answers that result from the testing are added to the body of knowledge we have about the natural universe. Scientific explanations are always subject to updates and modifications based on further testing. The scientific method generally has the following steps:
Sometimes, repeated testing by numerous researchers working in many different countries all support the same conclusion and stand the test of time. In these cases, the validity of the results is generally accepted by the scientific community and the conclusion may be considered a scientific theory. All scientific theories have been rigorously and exhaustively tested and are supported by a significant body of data. Please watch this short youtube video to see how the scientific method can be applied in your own daily life.Experimental or Research Design. Experiments or observations are used to test hypotheses. Specifically, they test the relationships between two (or more) variables. Often, scientists develop “Test Implications” or a series of “if…then” statements for testing with specific observations. There are two ways of conducting scientific tests:
Inductive vs. Deductive Reasoning In analyzing data acquired from observations and experiments, there are two types of logical reasoning that can be used—inductive or deductive reasoning.
This is the form of reasoning most suited to biological anthropology and almost always, the only form of reasoning used in biological anthropology. This is because of the data that we have available to work with in this field. Biological anthropologists are able to observe just a few groups of primates or collect one bone from an ancient hominid. These are specifics.
We are very rarely able to use deductive logic in anthropology because our general principles/theories are all derived from specific evidence (ex. All of the early hominid fossil finds are bipedal. Thus, early hominids were bipedal). Every time we find new specific data (like a new fossil) we have to adjust these general principles. As such, biological anthropologists cannot deduce that just because ‘early hominids were bipedal’, every hominid fossil find will be of a bipedal specimen. The next one (specific data) might not be, and thus make us rethink our general principle or bipedality.
Now you are ready to test out your powers of employing the scientific method. Four observations that have been made by a physical anthropologist are listed below. Please choose one of the observations, come up with a hypothesis to explain the observation, and design a testable experiment. Note: you have been awarded a fantastic grant from the National Science Foundation for your research, so money is no object here.
Observations
Activity 2 Now that you’ve practiced explaining someone else’s observations, you’re ready to test the process out on your own. Look around your house (or wherever you happen to be completing this lab) and note an observation or question that you want to test. These do not have to be large-scale phenomena—simple, testable observations will do. Examples: my dog tries to eat meat off my plate but not fruit, white socks get dirty faster than black socks, my baby sister cries if everyone leaves the room, etc. Then, fill out the scientific method flow chart on the next page and answer the reflection questions. In this activity, you will need to actually run your experiment, not just describe it. (NOTE: depending on your software capabilities, you can either type your answers directly in the boxes or create new headings and list all your answers below.) You may need to reference the short YouTube video above for explanation of some of the terminology.
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