How might I show only the first level of an Exposed Taxonomy Filter in Views? In Drupal 7, I have a exposed filter set at first in its hierarchical fashion

 

with the following structure:

Adjunct
-Adjunct Lecturer
-Adjunct Professor
Chairperson
Clinician
Container
-Director Advising &amp; Student Affairs
-Managing Director TIC
Deans
-Associate Dean Undergraduate Advising Administration
Department Chair
Emeritus
-Associate Professor Emeritus
-Professor Emeritus
Lecturer
-Senior Lecturer
Professor
-Assistant Professor
-Assistant Professor in Residence
-Associate Professor
-Associate Professor in Residence
-Research Scientist &amp; Professor
Speech Pathologist
Visiting
-Visiting Assistant Professor
-Visiting Associate Professor


In the exposed filter, is there a way to expose only the parent (first level) items (Adjunct, Deans, Department Chair, etc)?

Update: Grouping the exposed filter in views did not work (ticket).
Add " Taxonomy: Term ID (with depth)" and set the depth to "1" it will show the first level of terms.

For Drupal 6: 

Views Taxonomy: limit exposed dropdown by term depth module provides enhanced functionality for the exposed dropdown filter for taxonomy terms in Views.


  Exposed term filters can already be limited to display only terms
  selected in the Views interface. But what if content creators add new
  taxonomy terms? They will have to navigate the Views interface and add
  these new terms to the list of terms shown by exposed filters.