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My New Hammer Dulcimer – FINISHED

My New Hammer Dulcimer – FINISHED

After nearly exactly 3 months on and off work my new 15/14 hammer dulcimer is finished. I’ve have been playing my Dusty Strings 13/12 dulcimer (the numbers stand for the number of notes (or courses) on each bridge) for the past three years. For those not very familiar with this instrument Ardie Davis has a description and a nice American-slanted history article. It is a great starter instrument, IMG_3709but I began to crave a lower register,  more sound and an opportunity to revive my wood shop. This project met all three goals.

It isn’t really necessary to take 3 months to build a hammer dulcimer and I wish I had of taken better attention to the actual time taken.  But needless to say, this project was working on ‘retirement time’. For me that meant renovating the downstairs bathroom, moving through 2 of my Grad students defenses, skiing with my brothers and three writing “beyond LMS” articles for Contact North besides building a dulcimer.

adrie davis hammer dulcimerBeing both an amateur woodworker and a very amateur dulcimer player, I asked Mr Google to recommend a set of plans or a good book. Luckily Ardie Davis has a great, ‘step-by-step” book that I followed quite religiously. The rest of this post is likely only of interest to those thinking about constructing a hammered dulcimer and thus I go into more detail than the average reader will likely find of much interest.

As Northern Alberta is not known for the quality (nor quantity) of our hardwoods the first move (after a good reading of the book) was a trip to the commercial hardwood store. Exotic wood like walnut, sugar maple and baltic spruce are NOT cheap, but for $170 I walked away with 3 large hunks of rough cut wood (one walnut, 2 hard, sugar maple) and a 1/2 sheet 5/16″ baltic birch plywood. These hunks of wood were all that my 30 year old 3/4 horse table saw could handle (note to self – buy a new table saw!) but fortunately with a trip to a friends thickness planer they came out OK. I cut one pin block twice and it was still too short (sigh), so I had to glue on a thin piece, which you likely wouldn’t notice, except I’ve just told the world.

The sound board is the most important part of the dulcimer as it supports the 2 bridges and resonates under the strings giving the volume to the instrument. This design has a “floating sound board” meaning that it fits into dado slots on the sides and has a 1/2 gap at top and the bottom. This design allows maximum vibration of the sound board and lots of space for the sound to emerge. I was very fortunate to be given a piece of old growth, quarter sawn cedar, which a friend’s father had milled 30 years ago on Gambier Island off British Columbia. The grain was incredibly straight and we managed to cut it down to 1/4″ thick pieces and then laminate two together to make the 20″ wide sound board. Thank heavens for access to a thickness sander which did a terrific job on this heirloom cedar.

Following Ardie’s instructions carefully, I managed to cut and then glue up the 2 walnut end rails, side rails and the side pin blocks. Thankfully I had invested in 6 more bar dulcimer innardsclamps – you never have too many clamps! These outside pieces enclose the Baltic birch plywood bottom in dado slots (also bought a very nice new dado blade!). Notice from the picture that 2 one inch hardwood dowels were inserted before the 4 sides were glued together. These are designed to take the load on the pin blocks  when the 87 strings are finally tuned up. You can also see the three bridge supports – the only local wood (Aspen poplar) that a friend had milled in Northern Alberta. The bridge supports are needed, as besides lateral tension the strings also push the bridge down and would likely distort the soundboard without support.

Next came the making of the bass and treble bridges and the two side bridges also from the sugar maple. The sound bridges have holes drilled in them so that the strings can move across from one side bridge all the way to the opposite pin block without hitting any IMG_3705vibration ending pieces of the second bridge. I made the bridges slightly different than Ardie recommended and followed the design from my smaller dulcimer and others I have seen (see photo). I also didn’t thread the strings through the side bridges as Ardie recommends but led them on top under a piece of black devron plastic rod.

Next came adding a few screws and covering plugs, routing the rails and then hours of sanding!

I struggled with the decorative rosettes. On a floating sound board dulcimer like mine, it isn’t really necessary to have a sound hole to let the sound out, but they look so nice! So a good friend and I spent an afternoon on his CNC milling machine, taking some groovy pictures off the net and then importing the JPEGs into the machine’s software. Unfortunately, the cutter bits we had available were not fine enough and we eventually gave up and I ordered to two very nice rosettes ($14, US each) from the good folks at MusicMakers.

I ordered the hardware – tuning pins, hitch pins, and strings and received great service from James Jones Instruments ($168 US). How the low Canadian dollar hurts! Drilling the holes for the tuning pegs was relatively straightforward -AFTER you find the correct bit.  Ardie recommends a #15 drill bit, which is not metric, and not American but an obscure machinists’ standard – sizes not carried by the local hardware stores. Fortunately, IMG_3704asking around, I found a friend who lent me a set of these specialized bits. The holes have to be exact as the very fine thread of the tuning pin has to dig into enough wood to provide a stable and long lasting bite into the wood, without requiring a guerilla sized arm to turn.

Finally, I was  ready to start finishing (after more sanding). I decided to use MinWax Wipeon Poly and put on about 15 coats. Each coat dried quickly and although the finish isn’t factory perfect (I did it in my dusty wood shop) it looks OK. Ardie’s design allowed me to finish the soundboard before assembly and install it later, which was nice.

At this point I considered the value of installing a pickup to plug into my small guitar amp. I wasn’t sure it would really need the amplification, but if I didn’t do it now, I would never be able to get the amplification directly off the soundboard AND have it nicely concealed. So, I purchased a K&K  2 head acoustic pickup ($100) and installed the jack through the bottom rail.

While the finishing was taking place, I constructed the stand from maple according to the design Ardie recommends. In retrospect I should have made an adjustable stand that I could use standing up or sitting down, but this one works OK.

Finally the day for the big string up! 87 strings makes for a whole day of twisting, turning and coaxing wires around twice as many pins. I should have ordered a few spares of the top thin wires as one broke immediately and a second the following day. However, with 3 strings per note, you can get away with a few missing strings! The tuning seemed to take forever as the strings stretched and the whole dulcimer creaked! My trusty tuning app on the IPhone was indispensable for this task. Numerous times,  I would finally get the last strings in tune, only to find that the ones I had started with had all gone out of tune – sigh.

But eventually they stabilized and WOW what a sound compared to my smaller dulcimer.

All in, the instrument cost about $500 – in addition to providing rationale for buying a new (to me) router, router table and two new saw blades. The retail cost of such a dulcimer is around $1500 Canadian – and the pleasure of playing is priceless!

Lessons learned:
1. Don’t build an obscure instrument before the Internet – these long tail hobbies need a way to connect with suppliers and advice.

2. Use what social capital you have to beg and borrow both local expertise and tools.

3. Don’t strive for perfection – it is supposed to be a fun job!!

 

End of Jobs in Online Education?

End of Jobs in Online Education?

I started out my teaching career as a “shop teacher” – teaching middle school students how to work and built with a number of technologies. Thus, it was a bit disturbing to listen to recent CBC radio broadcast listing jobs that have disappeared and to hear that ‘shop teachers’ along with elevator operators, typists and postal worker were disappearing.

Two articles from the latest issue of Online Journal of Distance Education Administration, caught my attention for the same reason. Will technologies soon reduce or even eliminate the relatively new job position of “online teacher”.

The first article,

Vu, P., Fredrickson, S., & Meyer, R. (2016). Help at 3:00 AM! Providing 24/7 Timely Support to Online Students via a Virtual Assistant. Online Journal of Distance Education Administration, 19(1).  http://www.westga.edu/~distance/ojdla/spring191/vu_fredrickson_meyer191.html.

directly addresses the issue of substituting the traditional teacher role of answering student queries with a machine. The article notes that most online students do their work in the evening and on weekends when many teachers are not interested and often not available to answer questions.  In an attempt to provide some sort of 7/24 service the instructors built a chat bot and seeded it with a database of questions culled from archives of questions asked by students taking the course in previous terms.  Chat boots have rarely been used in education, though colleagues at Athabasca worked developing a Freudbot. But chat bots are becoming ubiquitous on online shopping sites where they provide a type of 7/24 customer support.

During the design-based research project the Bot was involved in 475 sets of interactions with the 56 students enrolled in 2 sections of an early Childhood Education course. As expected more than half of the interactions took place on weekends and 88% were during evenings. Of course some of the questions were ‘off topic” and used by curious students to learn the capabilities of the bot. But many were on topic with 65% of queries focussed on information seeking – much related to assignments and exams.

Of perhaps most interest was the students’ reactions, which were queried by 5 point Likert perception questions.  Only about half (m=2.5) found the bot did effectively  answer their question, but nearly all (m=4.8) noted the extra service provided 7/24 by the bot and over half (m=3.3) preferred asking the bot rather than emailing the teacher.  The effectiveness of these type of bots naturally grows as the data base expands through use and the searching algorithms improve. Thus, one can, even now, see how machines will undertake ishot-266at least some traditional teaching roles which in a positive sense can give teacher more time for more important learning diagnosis and help and reduce time spent on administrative type queries.  It is also interesting to think about the “teaching presence” of of the female avatar (displayed at left) used in this study. In any case a very nice exploratory, design-based study.

The second employment related article compared adjunct teachers employed in for-profit universities as compared to those in the not-for-profit sector. This is an important problem as more than half of online courses in the USA are taught by part-time sessional instructors. This in itself has huge implications on job stability for teaching faculty, but the rise (in the US) of for-profit universities with a tradition of not offering tenured positions, doing no research and not training next generation of scholars is also threatening.

Starcher, K., & Mandernach, J. (2016). An Examination of Adjunct Faculty Characteristics: Comparison between Non-Profit and For-Profit Institutions. Online Journal of Distance Education Administration,, 19(1).  http://www.westga.edu/~distance/ojdla/spring191/starcher_mandernach191.html.

This study used an online survey to query 859 online adjunct teachers. The results were remarkable in the lack of statistical differences between the teachers at the two types of institution. No differences in age, satisfaction, education or a host of other variables. There were small differences in class size, but this was confounded by the higher percentage of graduate courses (with normally smaller numbers of students) in the public, not-for-profit universities.

The authors put a nice spin on the discussion by noting that the similarity means that professional development and support can be shared between the sectors – unlikely as that may be. But the study also adds empirical support to the notion that education can be and is being  “privatized” with resulting decreasing employment for traditional, tenured faculty.

So what do I conclude from these two very good articles? I think one of the largest challenges for our global population (ranking right up there with climate change) is the capacity to meaningfully employ people in a context in which machines are more and more able to perform both mundane as well as high performance and high communication tasks. My Interaction Equivalency Theory speaks to this by noting the ways in which activity that used to be performed by live teachers (student-teacher interaction) can and is substituted by bots and canned media to create high quality student-content interaction.

The Enigma of Interaction

The Enigma of Interaction

I’ve been fascinated by the role of interaction all of my career as both a student, a researcher and a teacher. Michael Moore’s famous article details the role of  the ‘big three’ (student-student, student-content, student-teacher) interactions and influenced Randy Garrison and I to explore the other 3 possibilities (teacher-teacher, teacher-content and content-content interactions).  I’ve written a number of summary articles, a recent article on interaction in MOOCs  and note that interaction serves as the primary indicator of ‘presence’ in the Community of Inquiry (COI) Model.

anderson-learner-teacher-content-theory-p58

Many, many research articles have shown significant and positive relationships between interaction and a host of outcomes including persistence, achievement and enjoyment. However, these studies are almost always correlational and sometimes based exclusively on student perceptions. These are useful methodologies but marred by challenges of proving causation. Did the interaction cause the positive outcomes (causation) or do motivated students both interact more and get better marks (correlation)?

Thus, I was pleased to see an interaction study in the latest issue of IRRODL that used a quasi-experimental study to examine the impact of student-teacher interaction. The article:

Cho, M., & Tobias, S. (2016). Should Instructors Require Discussion in Online Courses? Effects of Online Discussion on Community of Inquiry, Learner Time, Satisfaction, and Achievement. The International Review Of Research In Open And Distributed Learning, 17(2). doi:http://dx.doi.org/10.19173/irrodl.v17i2.2342

The study was set in the context of a US undergraduate, fully online course with between 25-30 students in each of three sections taught by the same instructor. In the first instance there was no discussion. In the 2nd, the teacher posted a weekly discussion question and students were obliged to post at least one answer and one comment per week (typical forced participation that brought down the wrath of friend Jon Dron in a recent post). In the final section the teacher actively participated in the weekly discussions. In all cases the teacher was readily accessible via email.

A strength of the study was the multiple measures of interaction effects. These included:

  1. completion of the COI Inventory – a Likert-scale, perception instrument derived from the original indicators of teaching, social and cognitive presence).
  2. Student satisfaction measured by 3 lLkert questions
  3. Time on task as represented by login time to the LMS
  4. Student achievement as measured by final grade. The authors wisely excluded the marks for participation awarded in instance2 and 3.

Perhaps the least surprising outcome was that perceptions of social presence were significantly different with, as expected, higher perceptions of social presence in the more interactive instances. Also not surprising is that teaching presence increased in the 3rd instance, but not significantly.

The results became both interesting and surprising on the final 3 measures.  In each of the three course sections, each with markedly different amounts of interaction, there were NO significant differences in terms of time on task (logged into Blackboard), student satisfaction or student achievement. There was a small (but not significant ) increase in student satisfaction in the 3rd instance with enhanced teacher participation.

The discussion section of this paper is also very good. They note that time requirements for participation required in the forums in instances 2 and 3 did not end up costing students more time – at least as measured by Blackboard logins.  Finally, they note the obvious – teacher participation did not lead to increased achievement – despite the assumed time commitment required of the teacher.

These results tend to reduce support for the importance a number of the types of student and teaching presence described and promoted in the COI model. But the results provide support for the ideas I promoted in my Interaction Equivalency Theory.  I proposed there that given high levels of one of the three levels of interaction, the other two could be reduced without loss of academic achievement.  I also noted in my 2nd thesis of that work that likely increased satisfaction would results if more than one of the three forms were used (in this study, there was an increase but it was not significant in student satisfaction across the instances) but that it would come at increased cost (usually time to both teachers and students).

The study also did not look at attrition, perhaps because the numbers were small. I know from experience at Athabasca, when teaching and peer interaction is drastically reduced in self paced and continuous enrolment designs, that attrition almost always increases.

This excellent study concludes with recommendations for practice which include the note that student-student and student-teacher interaction are just choices and shouldn’t be considered to be hallmarks of all online (or classroom) courses. Good learning design counts!

A Fourth Presence for the Community of Inquiry Model?

A Fourth Presence for the Community of Inquiry Model?

The Community of Inquiry has emerged as the most widely referenced (the seminal 1999 article approaches 3,000 citations) and arguably the most widely used model for constructivist based e-learning design and research. I’ve always thought that it’s greatest strength is its simplicity (only 3 major, but interacting components) and the way the model can readily be used by teachers to devise and evaluate online learning courses and by researchers to guide the development of research questions and data collection strategies.

In the late 90’s we were interested in showing empirically that emerging ‘new’ forms of interactive distance education could support the type of high quality learning that is possible (though certainly not always available) in classrooms. We wanted to provide evidence for Randy Garrison’s claim that this was a new mode of teaching and learning that was education at a distance – not high tech, traditional cognitive behavioural style distance education. Thus, we focused on a key component of constructivist learning –social presence. We also picked up on Randy’s earlier work (based on Ennes, Paul and Lipman’s work) on critical thinking to devise the phases of cognitive presence. Finally, though Walter Archer, Randy and myself were all active in informal adult learning, we realized that the activity we were focusing on took place in institutional contexts with students studying in degree programs. Thus, we wanted a focus on the critical design, facilitation and subject matter expertise components of teaching presence.

Perhaps we quit too early, as this post argues next, but we had created a parsimonious model that was easily illustrated in the now famous COI Venn diagram. I also recall the fluidity with which new indicators were added to each of the presences as we poured over the transcripts from asynchronous computer conference based courses.   In early days, it was easy to add, delete or reword indicators, but the three presences seemed to us then to account for all the major themes of successful online courses. A special call out here to Liam Rourke who worked as a graduate student on this project, and was responsible for much of this early identification and classification work. The COI work was especially enhanced with the development by Ben Arbaugh and colleagues of the COI survey, which made it much easier to gather perception data to measure each of the three presences.

We have never argued that the model identifies all possible components of successful formal education – either online or in the classroom. And perhaps not surprisingly, it wasn’t long before additions (and a few deletions) were suggested. For example, David Annand, (2011) suggested that social presence wasn’t really needed for effective teaching and learning.

A number of researchers picked up on the need for the contextual or interface “presence” and in the case of distance education for the participants to master the mediating technology. Gilly Salmon (2000) in her famous 7 step e-learning moderation model sees such technical support as a key component of each of her moderation steps. I was never that impressed with these arguments as every context – including classrooms, uses some combination of asynchronous and synchronous media to support teaching and learning. Thus, the “presence” of the media and the need for and skill with which teachers and learners adapt to it is a minor factor that is unique to each teaching and context and I thought would needlessly complicate the COI model.

First came the close to convincing arguments from Peter Shea and his colleagues that the COI model lacked awareness of the critical role that the learner plays in formal education. We all realize that the same learning context and interventions can affect different students with vastly different effect. Thus, Shea and Bidjerano (2010) postulated the need for Learner Presence to account for these important learner set of variables in either online or classroom education.

Marti Cleveland-Innes, Prisca Campbell (2012) and other of Marti’s colleagues next argued that “emotional presence” was notably absent from the original COI model. My rather lame excuse that 3 males from Alberta, were very unlikely to posit the existence of emotional presence, since “real men” in Alberta, don’t do ‘emotion’. Rienties and Rivers (2014) picked up on these ideas of emotional presence in a review study – Measuring and Understanding Learner Emotions: Evidence and Prospects. They who directly added a fourth element to create what technically is now no longer a Venn diagram since it does not show all possible interactions of all 4 components.   It is now a Euler model – see http://math.stackexchange.com/questions/1475/why-can-a-venn-diagram-for-4-sets-not-be-constructed-using-circles).

The most recent suggestion for a fourth presence comes from Lam (2015) who validated the existence of the original three presences, and then coined a new term for the type of learner agency that resonates with Shea’s “learning presence. Unfortunately she described this new addition to the COI as “Autonomy Presence”. Wikipedia explains that Autonomy comes from Ancient Greek: αὐτονομία autonomia from αὐτόνομος autonomos from αὐτο- auto- “self” and νόμος nomos, “law”, hence when combined, is understood to mean “one who gives oneself one’s own law” (Wikipedia). The word is used largely in the context of independence and freedom to make one’s own decisions. In educational context, this “autonomy” is valued to some degree, but as all students know, is severely curtailed by the edicts and wishes of the teacher. The indicators that Lam uses to identify and classify autonomy presence are however becoming increasingly important as the Internet provides additional or supplemental resources and communities that students can use to enhance, augment and validate their learning. (see below)

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Terumi Miyazoe and I (2015) discussed this empowerment and the ability for students to increase student-student and student-content interaction in the context of my interaction equivalency theory in our 2015 paper Interaction Equivalency in the OER and Informal Learning Era.

It strikes me that the critical elements of learner, interface and autonomous presence flow directly from Alberta Bandura’s (1989) work on agency in which he described three types of agency in social cognitive theory. These are autonomous, mechanical and emergent interactive agency (p. 1175). The word agency evolved from Medieval Latin agentia “active operation,” Certainly the capacity for “active operation” can include most of the elements of interface presence since being productively active implies control over the environment. Shea’s reminder of the importance of the learning presence in the control of “active operation” is also subsumed in agency.

So my own suggestion in the search for the ‘missing’ element(s) in the COI model is to add agency presence to the COI trinity. This term is simpler than autonomous, builds on the seminal work of Bandura and captures the components mentioned by both Shea and Lam.

But where does that leave emotional presence? I argue that emotion is included in social presence (for example the indicator use of affective language) elements and in agency presence in line with both Bandura’s autonomous interaction – the capacity to recognize and use the power, insights and liability of emotional responses and his emergent agency in which emotions can be used to reach insights not accessible to those denying their existence or unable to deal with them effectively.

I haven’t validated this model empirically but it would likely include and consolidate many of the elements identified by Lam in her autonomous presence and Shea in his learning presence. And hopefully this addition would bring the COI model more in line with the emergent and networked resource ideas of modern connectivist theories.

References

Annand, D. (2011). Social presence within the community of inquiry framework. The International Review of Research in Open and Distributed Learning, 12(5), 40-56.

Bandura, A. (1989). Human agency in social cognitive theory. American psychologist, 44(9), 1175.

Cleveland-Innes, M., & Campbell, P. (2012). Emotional presence, learning, and the online learning environment. The International Review of Research in Open and Distributed Learning, 13(4), 269-292.

Lam, J. (2015). Autonomy presence in the extended community of inquiry International Journal of Continuing Education and Lifelong Learning, 81(1), 39-61.

Miyazoe, T., & Anderson, T. (2015). Interaction equivalency in an OER, MOOC and informal learning era. Best of Eden 2013 Issue – EURODL. http://www.eurodl.org/?p=special&sp=articles&inum=7&article=695.

Rienties, B., & Rivers, B. A. (2014). Measuring and understanding learner emotions: Evidence and prospects. Learning Analytics Community Exchange.

Salmon, G. (2000). E-moderating: The key to teaching and learning online. London: Kogan Page.

Shea, P., & Bidjerano, T. (2010). Learning presence: Towards a theory of self-efficacy, self-regulation, and the development of a communities of inquiry in online and blended learning environments. Computers & Education, 55(4), 1721-1731.