Dr. Kristopher J. Preacher, PhD, Vanderbilt University
Embracing nonlinear regression without getting all bent out of shape
Most social scientists are trained in the use of multiple linear regression and its many extensions, including structural equation modeling and multilevel modeling. Linear models have enjoyed unrivaled dominance in the field because of their perceived simplicity and generality. Yet, in many settings, linearity is highly restrictive and unrealistic. Nonlinear regression and nonlinear mixed-effects modeling offer a flexible set of alternatives that often are more faithful to reality, better reflect theory, and apply directly to interesting research hypotheses. Moreover, nonlinear models are surprisingly simple to apply, yet relative to linear models they are rarely used. We deconstruct the familiar linear regression model and frame it as a restrictive special case of a much broader class of nonlinear models. We explain how parameters of nonlinear models can be moderated, and we generalize familiar methods for plotting and probing linear interactions to the case of intrinsically nonlinear functions like logistic curves, exponential curves, and trigonometric functions. All of the options that are familiar from multiple linear regression are still available with nonlinear regression.
July 20th, 2023 at 3pm, Scurfield Hall 465. Reception to follow. RSVP to email@example.com
This presentation is delivered in cooperation with the Organizational Behavior and Human Resources area of the Haskayne School of Business. The content was developed in collaboration with Haley Yaremych.
Finding the Haskayne School of Business
All classes during the Rocky Mountain Methodology Academy are held at the University of Calgary in Mathison Hall, rooms 425 and 435. The Haskayne School of Business occupies Scurfield and Mathison Halls, which are both located at the intersection of Campus Gate Drive NW and Campus Drive NW in the southeast corner of campus and next to the Education Tower and Werklund School of Education. Note that some electronic maps provided with smartphones misplace the location of the business school. If using your smartphone for navigation, head to Scurfield or Mathison Halls rather than where your phone might be incorrectly telling you to go.
During the summer months, the University of Calgary provides accommodation for people attending events on campus. Various options are available ranging from traditional dormitory rooms, shared two room dorm suites with a common kitchen and bathroom, and traditional single room hotel-like accommodations. All rooms are a few minutes walk from the Haskayne School of Business and the University stop on the CTrain line gives you access to Kensington and downtown. Necessities of life can be found nearby at the MacEwan Student Centre, including a food court, pharmacy, convenience store, a pub, and numerous other stores. The University District is also a brief walk away, where you will find a major grocery store, numerous restaurants and bars, and miscellaneous retailers.
Rooms range in price from $99 to $139 per night, plus taxes. For more information and booking instructions, look at this brochure.
For more information on UCalgary accommodations visit https://www.ucalgary.ca/ancillary/accommodations-and-events/accommodations
Banff Trail is a residential neighbourhood adjacent to the University of Calgary. This area has numerous low to moderate price hotel chains. It is a brief walk (10-15 minutes) to the Haskayne School of Business. You will find a couple of small restaurants and fast food chains nearby as well as a convenience store. The Banff Trail CTrain station is nearby the hotels and it is only one stop north to University station and a few stops south to the Kensington and Sunnyside neighbourhoods and downtown, where you will find numerous restaurants, bars, shops, and parks. The hotel nearest the university is the Holiday Inn Express and Suites. Some other options include Hampton Inn and Suites, Aloft Hotel, and Comfort Inn and Suites.
The University District is a newly-developed residential and business community right next to the University of Calgary campus and about a 20 minute walk away from the Haskayne School of Business. All the conveniences of life can be found here, including a large grocery store, pharmacy, coffee shops, restaurants, a movie theatre, and miscellaneous shops. The Alt Hotel University District is currently the only hotel offering accommodations in the University District.
As the University District is adjacent to the University of Calgary campus, it is a convenient location to stay. However, the nearest train station (University station) to Kensington and the downtown area is about a 25 minute walk away. Otherwise, public bus or rideshare are the only other options available to get to your destination from the University District.
The Kensington and Sunnyside neighbourhoods are lively and active communities with many retail stores, coffee shops, restaurants, bars, and other amenities including a major grocery store, all packed together on a couple of streets at a walkable inner-city location. It is right across the Bow river from downtown. The Sunnyside CTrain stop makes it a convenient place to go to for food and fun after and between classes, and it is only a few CTrain stops away from the University of Calgary. In Kensington you will find the boutique Hotel Arts Kensington.
In the downtown, one CTrain stop further from Kensington and Sunnyside, you will find everything that downtown Calgary has to offer and that you would expect from a major city, including numerous hotels. For a lower price hotel option, you may try the Sandman Signature Downtown, a brief walk from the Kensington neighbourhood and with a CTrain stop next door. For a longer stay, consider the Marriott Residence Inn.
The CTrain is convenient and free in the downtown core, but a small fare is required for the brief trip from downtown to Kensington/Sunnyside and the University of Calgary.